Pacemaker batteries must be checked regularly. Some pacing systems allow patients to monitor battery life through a special telephone monitoring service that can read pacemaker signals.
DailyDaily
monthly
Commercially speaking, in the UK they have to be checked annually, and signed.
brake linings should be checked at 15,000 and 25,000 miles and then every 5,000 miles after that.
Every time it is worn!
Every time it is worn.
Every time the PFD is worn
With each brake job.
every 4 weeks in the community
Yes because people die often from building collapses.
Every time the PFD is worn