What year is the cut-off for electrical multi-meters and testers that no longer meet the code and should not be used?

Question

[Electrical] What year is the cut-off for electrical multi-meters and testers that no longer meet the code and should not be used?

Accepted Answer

Any meter or tester that was designed or produced before 1997 should not be used.  Before 1997, all electrical meters and testing devices did not meet the code.