In Portland Oregon.

Befo
House had large (high) crawlspace. Pony stud walls and foundation
walls were insulated with foil backed 3 1/2" insulation. No insulation
between floor joists. I assume it was foil backed due to fire codes
for "exposed" insulation.

After:
Dug out crawlspace. Constructed new mini-foundation (about 4 feet
high) inside a few feet of the existing foundation. Poured concrete
slab floor. Built new stud walls inside the new mini-foundation. This
means these stud wall are around 4 feet from the original pony stud
walls and original foundation.

Question. How do I insulate these new basement rooms (game room,
bedroom, office) to meet code?