4. Subject to regulations 6 to 10, a district council is hereby authorised to charge a fee—
(a)for or in connection with the performance by it of the function prescribed by regulation 3(a) (in these regulations called a “plan fee”);
(b)for or in connection with the performance by it of the function prescribed by regulation 3(b) (in these regulations called an “inspection fee”);
(c)for or in connection with the performance by it of the function prescribed by regulation 3(c) (in these regulations called a “building notice fee”); and
(d)for or in connection with the performance by it of the function prescribed by regulation 3(d) (in these regulations called a “regularisation fee”).