Frozen DB plan and SPD/SMM requirements

[alexa]

I have a db plan frozen 12/31/2013

SPD is really old 12/1/2000

I am assuming at least an SMM should have been done?

plan doc was restated 1/1/2015

are there different requiremnts when a DB plan is frozen;ie. 5 years after a major change, 10 years otherwise?

Much thanks

Lexy