Subject as hereinafter provided, the collective worship required by subsection (1) of the last foregoing section shall not, in any county school, be distinctive of any particular religious denomination, and the religious instruction given to any pupils in attendance at a county school in conformity with the requirements of subsection (2) of the said section shall be given in accordance with an agreed syllabus adopted for the school or for those pupils and shall not include any catechism or formulary which is distinctive of any particular religious denomination :
Provided that, where a county secondary school is so situated that arrangements cannot conveniently be made for the withdrawal of pupils from the school in accordance with the provisions of this Act to receive religious instruction elsewhere, then, if the local education authority are satisfied :—
(a)that the parents of pupils in attendance at the school desire them to receive religious instruction in the school in accordance with the tenets of a particular religious denomination ; and
(b)that satisfactory arrangements have been made for the provision of such instruction to those pupils in the school and for securing that the cost of providing such instruction to those pupils in the school will not fall upon the authority;
the authority shall, unless they are satisfied that owing to any special circumstances it would be unreasonable so to do, provide facilities for the carrying out of those arrangements.