The requirement prescribed by this section is that the person on whom the notice is served must refrain from—
permitting a room to be occupied as sleeping accommodation otherwise than in accordance with the notice; or
permitting persons to occupy the HMO as sleeping accommodation in such numbers that it is not possible to avoid persons of opposite sexes who are not living together as a married couple or civil partners sleeping in the same room.
For the purposes of subsection (1)(b)—
children under the age of 10 are to be disregarded; and
it must be assumed that the persons occupying the HMO as sleeping accommodation sleep only in rooms for which a maximum is set by the notice and that the maximum set for each room is not exceeded.