I do not think there is a code requirement to do so since the items would no no be energized.
110.3(B) if the instructions say to do so and it is part of the listing of the retrofit kits.
110.3(B) Installation and Use.
Listed or labeled equipment
shall be installed and used in accordance with any instruc-
tions included in the listing or labeling
410.6 Listing Required.
All luminaires, lampholders, and
retrofit kits shall be listed.
Edit: Merged threads and ended up just repeating what iwire said. Phooey.