Direct comparison
IACUC PAM vs. Semiannual Review
PAM continuously checks individual active protocols; the semiannual review audits the whole program twice a year. How the two IACUC mechanisms differ.
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Side-by-side comparison
| Dimension | Post-Approval Monitoring (PAM) | Semiannual Program Review |
|---|---|---|
| Legal/regulatory basis | Not named in the AWA regulations (9 CFR) or PHS Policy; recommended by the Guide for the Care and Use of Laboratory Animals (8th ed.) and OLAW guidance as a way to fulfill the IACUC's continuing-oversight authority under 9 CFR 2.31(c)/(d) and PHS Policy IV.C.8. | Explicitly mandated by name: 9 CFR 2.31(c) (AWA-covered species) and PHS Policy Section IV.B (PHS-supported vertebrate species). |
| What it evaluates | Protocol congruency for one specific active protocol -- whether lab/vivarium practice matches what the IACUC approved. | The institution's entire animal care and use program and every animal facility, evaluated as a whole against the Guide. |
| Unit of review | Individual protocol / individual investigator's practice. | Whole institutional program and all facilities collectively. |
| Frequency | Institution-designed; no federal minimum. Commonly risk-based -- higher-risk or new protocols reviewed more often. | At least once every six months, without exception -- a fixed federal floor. |
| Notice to investigator | May be unannounced; unannounced visits are common and considered a program strength. | Scheduled review/inspection conducted by the IACUC as a convened body. |
| Who conducts it | Varies by institution: IACUC compliance staff, Attending Veterinarian or designee, veterinary technicians, or IACUC members with relevant expertise. | The IACUC itself, as a committee; report signed by a majority of members. |
| Documentation produced | Institution-designed monitoring report/checklist per visit, routed to the investigator and escalated if significant. | Formal written report to the Institutional Official classifying any deficiency as significant or minor, with a correction plan and schedule. |
| Reported to OLAW? | Not routinely -- an internal program tool; serious findings still trigger standard noncompliance reporting. | Only if OLAW requests it, or as part of a new/renewal PHS Assurance from a non-AAALAC-accredited institution. |
| Can one substitute for the other? | No -- even a strong PAM program does not satisfy the IV.B/9 CFR 2.31(c) semiannual requirement. | No -- passing the semiannual review does not confirm individual protocols are being followed day-to-day; that is PAM's role. |
Common questions
FAQ
Is Post-Approval Monitoring legally required?+
Not by name. Neither the Animal Welfare Act regulations (9 CFR) nor PHS Policy use the term "Post-Approval Monitoring" or mandate a specific PAM program. What is required is that the IACUC exercise continuing oversight of approved activities (9 CFR 2.31(c)/(d); PHS Policy IV.C.8), and PAM is the field's standard, Guide-recommended way institutions fulfill that duty in practice. Once an institution adopts a PAM policy, following it becomes a real institutional and Assurance commitment, even though the program's design isn't federally prescribed.
Does the semiannual review look at individual protocols?+
Only at a program level, not protocol by protocol. The semiannual review evaluates the animal care and use program and facilities as a whole against the Guide; it is not designed to catch whether one specific investigator is deviating from an approved procedure in the lab that week. That gap is what PAM is designed to close.
Can PAM findings trigger a report to OLAW?+
Yes, indirectly. PAM itself isn't routinely reported to OLAW, but if a PAM visit surfaces serious or continuing noncompliance with PHS Policy, or a serious departure from the Guide, that finding falls under the same reporting obligation that applies regardless of how the noncompliance was discovered.
Who decides how often PAM happens?+
The institution, through its IACUC-approved PAM policy or SOP. There is no federal minimum frequency for PAM, unlike the fixed six-month floor for the semiannual review. Most institutional PAM programs are risk-based, monitoring higher-risk protocols (for example, significant pain/distress categories, hazardous agents, or survival surgery) more frequently than routine ones.
