(a) Except as provided in § 58.15(c), if an approved agency was not an approved agency immediately prior to the date it last obtained approval to be an approved agency, such an approved agency shall cease to be an approved agency six months from the date on which it was approved unless the United States Trustee approves an additional one year period.

(b) Except as provided in § 58.15(c), if an approved agency was an approved agency immediately prior to the date it last obtained approval to be an approved agency, such an agency shall cease to be an approved agency one year from the date on which it was last approved to be an approved agency unless the United States Trustee approves an additional one year period.