NIH and the Office of Laboratory Animal Welfare (OLAW) encourage institutions with existing PHS Animal Welfare Assurances to begin using the 2013 guidelines when reviewing research projects, as soon as possible. All grantees are expected to fully implement these guidelines by September 1, 2013. After this date, previously approved projects undergoing continuing review according to PHS Policy, IV.C.5., must be reviewed using the 2013 guidelines.
NIH is seeking input from the public on any concerns they may have regarding the updated guidelines. Public comments must be submitted electronically here by May 31, 2013.