This section applies if an authority which has received a notice under section 52F(8), 52G(2) or 52H(4) above fails to comply with section 52I or 52J above (as the case may be) before the end of—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
the period of 21 days beginning with the day on which the authority receives the notice ....
In the case of a billing authority, the Welsh Ministers may direct the authority to comply with section 52I.
A direction under this section is enforceable, on the application of the Welsh Ministers, by a mandatory order.
In the case of a major precepting authority, any authority to which it has power to issue a precept shall have no power during the period of restriction to pay anything in respect of a precept issued by it for the year.
For the purposes of this section the period of restriction is the period which—
begins at the end of the period mentioned in subsection (1) above, and
ends at the time (if any) when the authority complies with section ... 52J above.