Defined activities3
For the purpose of interpreting subsection (2)(h) of section 2 of the Act (as inserted by article 2(1) above), section 2 shall be read with the substitution for subsection (6) of the following—
6
Work which is carried out by a defined authority through an employee and which would (apart from this subsection) fall within a defined activity shall not do so if the total amount of such work performed by that employee occupies—
a
in the case of an employee who is normally employed for more than 30 hours per week, less than 25% of his working time, or
b
in the case of any other employee, less than 50% of his working time.