Subject to the limitation provided in Subsection C of this section, a pool policy offered in accordance with the Medical Insurance Pool Act shall impose a deductible on a per-person calendar-year basis. Deductible plans of five hundred dollars ($500) and one thousand dollars ($1,000) shall initially be offered. The board may authorize deductibles in other amounts. The deductible shall be applied to the first five hundred dollars ($500) or one thousand dollars ($1,000) of eligible expenses incurred by the covered person.