Originally Posted by
rickair7777
I'm not sure but reading the regs literally would seem to imply that would be the case.
A new rating might not re-instate the ratings on your old expired certificate. Probably better ask your FSDO to be sure.
You need to know your enemy. From the FSIMS:
5-502 REINSTATEMENT. A holder of an expired flight instructor certificate issued after November 1, 1975 may have all ratings reinstated by accomplishing a flight instructor additional rating practical test.