4.—(1) At any school or further education institution there shall be employed a staff of teachers suitable and sufficient in numbers for the purpose of securing the provision of education appropriate to the ages, abilities, aptitudes and needs of the pupils or students having regard to any arrangements for the utilisation of the services of teachers employed otherwise than at the school or further education institution in question.
(2) Without prejudice to the generality of paragraph (1)—
(a)the staff of teachers employed at a school shall include a head teacher;
(b)the staff of teachers employed at a further education institution shall have qualifications appropriate to the giving of adequate instruction in the subjects in which courses are provided.
(3) The requirement in paragraph (1) is additional to the requirements relating to qualifications for employment at schools contained in Part IV of these Regulations.