No part of a student’s covenant income or grant income shall be disregarded under paragraph 12 of Schedule 3 and any other income to which sub-paragraph (1) of that paragraph applies shall be disregarded thereunder only to the extent that the amount disregarded under regulation 43(2)(b) (calculation of covenant income where a contribution is assessed) or, as the case may be, regulation 44(1)(c) (calculation of covenant income where no grant income or no contribution is assessed) is less than £10.