Ar ôl paragraff 9(a) o Atodlen 1 i Reoliadau Budd-dâl Nawdd Cymdeithasol (Cyfrifo Enillion) 199639 (symiau sydd i'w diystyru wrth gyfrifo enillion), mewnosoder—

“(aa)

a part-time fire-fighter employed by a fire and rescue authority;”.