How Often Must Practice Rescue Exercises Be Conducted? (29 CFR 1910.146)

Last Updated: November 2026

Employees designated to provide permit space rescue must practice making permit space rescues at least once every 12 months. The requirement is 29 CFR 1910.146(k)(2)(iv), and it falls on the employer whose own employees are the designated rescue service. The practice has to be a simulated rescue in which those employees remove dummies, manikins or actual persons from the actual permit spaces they would respond to, or from representative spaces that match those spaces in opening size, configuration and accessibility. The 12-month clock runs on the practice drill, not on classroom training. Paragraph (g), which governs confined space training itself, contains no calendar interval at all.

The exact requirement

29 CFR 1910.146(k)(2)(iv) reads:

Ensure that affected employees practice making permit space rescues at least once every 12 months, by means of simulated rescue operations in which they remove dummies, manikins, or actual persons from the actual permit spaces or from representative permit spaces. Representative permit spaces shall, with respect to opening size, configuration, and accessibility, simulate the types of permit spaces from which rescue is to be performed.

Two details in that sentence decide most compliance arguments. The first is “at least once every 12 months”, which is a rolling interval measured from the last drill, not a calendar-year obligation you can satisfy in December and again the following January. The second is “practice making permit space rescues”. The drill has to be the rescue, not a tabletop walkthrough of the rescue.

Who the 12-month rule applies to

The 12-month drill sits inside paragraph (k)(2), which opens: “An employer whose employees have been designated to provide permit space rescue and emergency services shall take the following measures.” That scoping sentence is why the answer to this question is often wrong in both directions.

If your own maintenance crew, EHS staff or plant emergency response team is the designated rescue service for your permit spaces, you owe the drill. If you have arranged for an outside rescue service, paragraph (k)(1) governs your duties as host employer, and the (k)(2) duties, including the drill, belong to whoever employs the rescuers. A host employer who relies on the municipal fire department does not run a 12-month manikin extraction; a host employer who relies on four of its own millwrights does.

The practical failure mode is the middle case. Facilities that name an outside service on the permit but still send their own entrants in to attempt non-entry retrieval have designated those employees for rescue in substance, whatever the paperwork says, and the (k)(2) measures follow.

What counts as practice

The standard names three acceptable loads: dummies, manikins, or actual persons. It names two acceptable locations: the actual permit spaces, or representative permit spaces. A representative space has to simulate the real ones on three specific dimensions, and the standard lists them rather than leaving it to judgment:

Nothing in the standard requires a third-party instructor, a certificate, or a particular curriculum for the drill. It requires that the practice happened, that it was a simulated rescue, and that the space it happened in matched the spaces you would really enter.

What the 12-month rule is not

It is not a confined space training interval. Training under paragraph (g) is event-triggered: before first assignment, before a change in assigned duties, when a change in permit space operations presents an untrained hazard, and when the employer has reason to believe there are deviations from the entry procedures or inadequacies in an employee’s knowledge of them. There is no annual retraining paragraph in 1910.146.

It is also only one of four duties in (k)(2). The other three are easy to lose track of because the drill is the one with a date attached: (k)(2)(i) requires the PPE needed to conduct rescues safely plus training to proficiency in its use at no cost to employees; (k)(2)(ii) requires that rescuers also complete the authorized entrant training under paragraphs (g) and (h); and (k)(2)(iii) requires training in basic first aid and CPR, with at least one member of the team holding a current first aid and CPR certification available.

Construction work is a separate standard. Permit-required confined spaces in construction are covered by 29 CFR 1926 subpart AA, not by 1910.146, and an employer doing construction work should read the rescue provisions there rather than assuming the general industry paragraph numbers carry over.

Where VR fits, and where it does not

Humulo’s position: a VR confined space simulation cannot discharge 1910.146(k)(2)(iv). The paragraph requires employees to physically remove a dummy, manikin or person from a real or representative space. That is a physical act with real rigging, real portal geometry and real load, and a headset does not produce it. Any vendor who tells you otherwise is selling you an audit finding.

What a simulation does carry is the knowledge layer around the drill: atmospheric hazard recognition, permit review, the entrant and attendant duties under paragraphs (g) and (h) that (k)(2)(ii) also demands of rescuers, and the decision sequence an attendant runs before anyone enters. Those are the parts of confined space competence that decay between drills and that are expensive to rehearse in a live space. Running them in VR is how facilities we work with get entrants and attendants more repetitions per year without pulling a vessel out of service.

Frequently asked questions

How often must practice rescue exercises be conducted?

At least once every 12 months, for employees designated to provide permit space rescue, under 29 CFR 1910.146(k)(2)(iv).

Is the answer once a year, twice a year, or every two years?

At least once a year. The standard’s words are “at least once every 12 months”, so once a year is the floor and more often is permitted. Two years does not comply.

Does a successful real rescue count as the drill?

1910.146(k)(2)(iv) does not contain an exception for a real rescue, so under the general industry standard the 12-month practice obligation stands on its own terms. The construction standard at 29 CFR 1926 subpart AA is written differently, which is one reason the answers circulating online disagree.

Do we owe the drill if the fire department is our rescue service?

No. Paragraph (k)(2) is addressed to the employer whose employees are designated to provide rescue. If the service is external, your duties are the host employer duties in (k)(1), and the drill belongs to the rescuers’ employer.

Is confined space training itself required annually?

No. 1910.146(g)(2) is trigger-based with no calendar interval. Two other paragraphs do carry a 12-month clock and get confused with it: the rescue drill in (k)(2)(iv), and the permit space program review in (d)(14), which is owed within 1 year after each entry.

Can VR training satisfy the practice rescue requirement?

No. The requirement is the physical removal of a dummy, manikin or person from an actual or representative permit space. VR can deliver the entrant, attendant and hazard-recognition knowledge that (k)(2)(ii) also requires of rescuers, but it does not replace the extraction drill.

Source: 29 CFR 1910.146, Permit-required confined spaces, paragraphs (g) and (k), as published by OSHA. Paragraph text verified against osha.gov on 4 November 2026.