To clarify...

Premium (P) seats - Can be pre-reserved only by elites (no charge). Can be chosen by anyone during OLCI.

Coach Choice (C$ and E$) - Cannot be pre-reserved by anyone. Can be chosen by anyone during OLCI. Elites don't pay the fee.

Exit Rows (E) - Can be pre-reserved only by Platinum elites. Can be chosen by anyone during OLCI (no charge).

Handicapped - Can be pre-reserved by calling NW and proving you need them. Can be chosen by anyone during OLCI.