What are requirements for expiration date of Life raft and its equipment?

Some vessels an observation during vetting inspection that the onboard both life rafts were serviced f.e. in July 2014, however the first aid kit, Parachute rocket, hand flares, smoke signal and battery for signal lamp all expired in Feb 2015.

All vessels are advised to check their life raft servicing records and verify that all content within the life raft have an expiry not later than the life raft annual service date.