24 CFR §3280.108

1. (a)Interior doors having passage hardware without a privacy lock, or with a privacy lock not engaged, shall open from either side by a single movement of the hardware mechanism in any direction.
2. (b)Each manufactured home interior door, when provided with a privacy lock, shall have a privacy lock that has an emergency release on the outside to permit entry when the lock has been locked by a locking knob, lever, button, or other locking device on the inside.
3. (c)All interior swinging doors must have a minimum clear opening of 27 inches except doors to toilet compartments in single-section homes (see § 3280.111(b)), and doors to closets and pantries.