Which Type of IRB Review Does Not Require an IRB Approval but Does Require a Determination by an Individual Designated With That Task: The Exempt-Review Pathway

The review type you're describing is exempt review. Under the Common Rule (45 CFR 46.104), certain human-subjects studies are exempt from full IRB approval, but the determination of exemption must be made by someone the institution designates — typically an IRB chair, an IRB member, or experienced research-compliance staff — and that person's job is to confirm the study qualifies, not to approve it.

Exempt Is a Determination, Not an Approval

Exempt review is a regulatory category, not a shortcut invented by local offices. The Common Rule lists eight exempt categories in 45 CFR 46.104, covering things like anonymous surveys, benign educational tests, and analysis of existing de-identified data. The phrase that matters is "exempt from this policy" — exempt from the full policy's approval machinery, but not from institutional oversight.

The key distinction is who decides. A full or expedited review ends in IRB approval, issued by the convened committee. An exempt determination is issued by an individual the institution delegates for that task, and that individual's title varies by site: IRB administrator, IRB chair, compliance specialist, or a designated reviewer in the research office.

That single reviewer does not approve anything. They determine whether the study meets a listed exemption category, and if it does, the study proceeds without IRB approval. If the reviewer thinks the study does not qualify, the file gets routed to expedited or full review, where actual approval becomes possible.

This is why the question's wording is precise. It's not asking which studies are legally exempt — those exist independent of any office. It's asking which review pathway at a real institution results in a determination rather than an approval, and exempt review is the only pathway with that outcome.

The Five Determinations Exempt Reviewers Actually Make

A designated reviewer isn't just stamping "exempt" or "not exempt." OIRA guidance and institutional policies describe a menu of outcomes. Knowing them tells you what to expect after you submit.

The reviewer can determine the study is exempt under a specific category and issue a determination letter. They can determine the study is not exempt and route it for expedited or full review. They can determine the study is exempt but attach limited conditions, which some institutions call "exempt with restrictions." They can return the submission for clarification or additional information. And they can determine the activity is not human-subjects research at all, which is a separate certificate some institutions issue.

That middle outcome surprises people. An exempt file can come back with conditions, such as a requirement to use the approved consent script or to stop collecting identifiers. Conditions keep the study within the exemption category the reviewer relied on — they aren't probation.

A real example clarifies the flow. A university research office receives a submission for an anonymous online survey with no identifiers and no vulnerable populations. The compliance reviewer reads the protocol, confirms it fits exempt category 2 under 45 CFR 46.104, and issues a determination letter with an expiration-free date. The PI can now collect data without an IRB approval stamp.

Now change one fact: the survey collects names and stores them in a linked file. The reviewer determines the study is not exempt and routes it to expedited review. No determination letter issues, but a deferred action notice does.

Why a Full IRB Approval Never Comes Back From This Pathway

This is the boundary that separates exempt review from every other pathway, and institutions build their operations around it. Exempt determinations are not approvals. They don't come with approval dates, continuing-review cycles, or stamped consent forms in the traditional sense.

Under Common Rule standards, studies issued a determination don't require continuing review the way approved studies did before the 2018 revisions. The 2018 Common Rule largely eliminated continuing review for expedited studies but kept it for full-board studies, and exempt studies were never in that cycle to begin with.

A frequent failure case proves the boundary. A graduate student submits a study and gets a determination letter marked "Exempt Category 2." The department grants office later asks for an "IRB approval letter" for a grant submission. The student forwards the exemption letter.

The grants administrator rejects it, because funding agencies sometimes specify that human-subjects documentation must show IRB approval, and an exempt determination can fail that check. The student's fix is a letter from the research office explaining the study is exempt and needs no approval, plus a confirmation of the reviewing authority.

The edge scenario gets sharper. A study initially determined exempt later changes its methods — say, adding interviews with prisoners. The exemption no longer fits. The correct move is a new submission routed to expedited or full review, not an amendment to the exemption letter. Institutions treat changes to determinations as new review events, and a PI who skips this step faces a compliance finding even though the original determination was clean.

Categories 1 Through 8: What Qualifies Before a Reviewer Sees It

You can't assign a category to the reviewer. But knowing the eight categories in 45 CFR 46.104 helps you predict the outcome and avoid wasted cycles. The list below mirrors the regulation's structure; institutions must adopt the 2018 categories to use them, so confirm yours has.

Category 1: Research in educational settings involving normal educational practices. Category 2: Anonymous surveys, interviews, or observations of public behavior. Category 3: Benign behavioral interventions in adults, with limited collection of identifiable information. Category 4: Secondary research using identifiable private information, with limited review conditions. Category 5: Research on public-benefit programs conducted by their own agencies. Category 6: Taste-and-food-quality evaluation studies. Category 7: Storage of identifiable data for secondary research, with broad consent and limited review. Category 8: Secondary research using legally regulated biological specimens or data.

Two categories carry traps worth naming. Category 4 and Category 8 are often called the "limited IRB review" categories, because the regulation requires an IRB to conduct a limited review of specific criteria — privacy safeguards and broad consent documentation — as part of the exemption process. That limited review is conducted by an IRB or its designee, and some institutions route these files to an IRB member rather than routine staff because the criteria are substantive.

A practical case: a team wants to analyze de-identified tissue samples from a previously consented biobank. If the samples are identifiable and the study involves secondary research, Category 8 may apply, but the limited IRB review criteria — consent documentation matching, privacy safeguards — still need checking by someone with IRB authority.

That's why some institutions mirror category numbering in their submission forms. When the form says "Category 8: Limited IRB Review Required," the routing already anticipates an IRB member's signature, not a staff stamp.

Expedited, Full, and Exempt Side by Side

Expedited review and exempt review are regularly confused because both move fast and both usually skip the convened board. The difference is the outcome and who signs. An expedited reviewer is an IRB member who approves the study under 45 CFR 46.110. An exempt reviewer issues a determination under 45 CFR 46.104. One produces approval; the other produces a determination.

Full board review is the third pathway: at least five IRB members, including a non-scientist and someone unaffiliated with the institution, meet and vote. That's the only pathway with a convened quorum and a formal vote.

Read the options by need rather than speed. A study of anonymous public surveys needs exemption review; it can't buy its way into faster approval because no approval is the correct product. A minimal-risk intervention with planned follow-up calls needs an IRB member to review under 45 CFR 46.110, because the intervention is benign but not category-eligible in every case. A study enrolling children in a randomized trial with invasive procedures needs full board review, even if the protocol is polished and minimal time is available.

Continuing review deserves a note. The 2018 Common Rule eliminated continuing review for exempt studies and for expedited studies unless FDA rules apply. A research office that once required annual reports for exempt files now often requires no periodic report at all — but the PI's duty to report changes that affect the determination remains, and that obligation tracks the determination letter's terms.

The Exemption Screening Walkthrough

Before you submit, you can run the reviewer's logic yourself. The sequence below is the one experienced compliance staff use to decide whether a file even belongs on the exempt track. Use it as preparation, not as a substitute for the reviewer's determination.

1: Open 45 CFR 46.104 and read the category you think applies, plus the "(b)" and "(c)" caveats at the end of the section on limited review and the Secretary's list of additional categories. 2: Match the study's activities to the category language — not to a similar-sounding neighbor category, and not to the survey instrument's topic. 3: Check the qualifiers specific to your category: anonymity requirements, public-behavior limits, benign-intervention criteria, and the limited-review criteria for Categories 4, 7, and 8. 4: Confirm whether the study is FDA-regulated. FDA-regulated research falls under 21 CFR 56 and a separate exemption list at 21 CFR 56.104, and the Common Rule's categories may not apply. 5: If the study involves prisoners, pregnant people, children, or other vulnerable populations, confirm the exemption still applies — vulnerable populations can push a study out of an exemption category. 6: Prepare the documentation your office requires for a determination, which usually includes the protocol, data-collection instruments, consent materials, and a self-classification statement. 7: Submit and meet with the reviewer before assuming the determination will follow your reading. Exemption letters are institutional decisions and the reviewer's scope can include sites, funding, and state law.

Where the walkthrough breaks is the third step, and that's the failure-handling point to internalize. A PI who reads only the first sentence of Category 2 will submit a survey with names and wonder why it goes to expedited review. Read the full category, the caveats, and the limited-review language first. If still unsure, contact the research office before submitting, because an incomplete exempt submission gets returned and loses the time you thought you saved.

What the Designated Reviewer Documents

The reviewer's paperwork matters to PIs because it decides grant, audit, and publication questions later. A typical determination letter contains the study title and PI, the exemption category cited, the basis for the determination, the review date, the name of the designated reviewer, and signature authority.

Some institutions include an expiration-free statement — exempt determinations don't expire. Others include a scope note: "This determination covers the study as submitted and does not extend to changes in research." That sentence turns a routine letter into a reference document for later amendments.

The file also gets an internal record showing the decision chain. The reviewer notes why the study meets the category, what was checked, and whether any conditions were attached. That record is what an institution produces in response to an auditor's question about why a study proceeded without approval.

If a study was funded by a federal agency, the federal award's terms may require the institution to maintain the determination record for a stated retention period. The institution, not the PI, owns that duty, but the PI should keep the letter in the study binder anyway.

Misuse of the letter is the most common documentation problem. Printing a determination letter and calling it an approval creates downstream chaos — grant offices rely on the wording. If a sponsor's system has a single field for "IRB approval date" and the study is exempt, confirm on the maker's side — meaning your research office — how they want it recorded. Some offices issue a separate certification of exemption review for that purpose.

State Law and Sponsor Rules Override a Clean Determination

A federally compliant determination doesn't clear every gate. State research-privacy laws and sponsor rules add conditions the federal categories don't address.

Some state statutes restrict analysis of identifiable health data beyond what the Common Rule requires. A study might be exempt under Category 4 and still violate a state data-protection condition if identifiers move out of state contrary to a state health-data statute.

Many institutions address this with a referral rule: exempt submissions touching regulated health data or state-protected categories go through a supplementary check before the determination letter issues. The reviewer, not the PI, makes that call under the institution's authority.

Sponsors are a separate gate. A foundation or federal agency may include terms requiring prior IRB review for research involving human subjects, and the exemption doesn't cancel those terms. The PI who gets a determination and then submits a proposal meets a conflict between the letter and the sponsor's award conditions.

Reviewer discretion fills the gap. A designated reviewer can issue the determination and add a caveat describing the limiting condition — such as "this determination does not substitute for sponsor terms" — which is the institution's way of saying the reviewer noted the edge case. PIs who plan multi-site work should ask the research office whether site reliance agreements treat the determination as the governing document, because reliance strategy is where state and sponsor rules collide.

Funders' own compliance offices rarely read exemption letters. They read sponsor schedules. If your award condition lists human-subjects review requirements, the research office can document that the study received a compliant exempt determination, but sponsor approval remains a separate step.

Common Mistakes PIs Bring to the Exemption Desk

Most problems on an exempt file are self-inflicted and fixable before submission. The five below account for a large share of returned submissions at research offices.

Mistake one: treating the determination like an approval and starting data collection on the assumed letter date. The letter's date is the determination date; the reviewer hasn't yet issued anything while the file sits in queue.

Mistake two: submitting an exempt application for a study that clearly needs expedited review, such as an experiment with a mild device, because the office "looks fast." A wrong-track submission is not a shortcut; it is a return-to-sender.

Mistake three: forgetting amendments. Adding identifiers, vulnerable subjects, or a new instrument after a determination requires a new submission and possibly a new category match.

Mistake four: overlooking the limited-review categories. Categories 4, 7, and 8 routinely trigger extra criteria the reviewer must document, and a file prepared without that documentation returns.

Mistake five: raising the exemption category for an activity that is not human-subjects research at all. Some offices issue a "not human subjects research" determination, which is a separate product with separate documentation.

Fix mistakes three and four last, because they recur across protocol lifetimes. The amendment is the operational trigger, and the limited-review categories are the paperwork trigger. Checking both before submission saves the cycle.

What the Exempt-Review Determination Means for Your Project

The determination is an institutional statement with a legal anchor. It says the study fits a listed category under 45 CFR 46.104 and that the designated reviewer checked it, not that an IRB board reviewed the science. Read it as a scope document.

Start with the letter's category line. That line tells you what the reviewer relied on and what conditions to expect. Then check the letter for whether it covers the study as submitted. Finally, compare the letter to the sponsor's terms and the institution's reporting rules.

The time computation matters even if the letter is clean. From submission to determination, an exempt file typically moves in days to a few weeks, while a full-board file waits on meeting calendars — and every post-determination amendment may restart review on the changed portion. The cumulative cost for a project with three later changes is the original submission time plus the amendment submission times, which is often still below a single full-board meeting cycle.

So when someone asks what type of review produces a determination instead of an approval, the answer is exempt review, and the reviewer's scope is narrow on purpose. If you're planning a study and unsure whether the track is exempt, expedited, or full, ask the assigned reviewer before submitting. The article is general educational information and not a legal opinion or compliance ruling; research rules vary by institution, state, and sponsor, so consult your institutional research office or a qualified research-compliance professional about your specific study.