If—
serving a hazard awareness notice under this section in respect of the hazard is a course of action available to the authority in relation to the hazard for the purposes of section 5 (category 1 hazards: general duty to take enforcement action).
A hazard awareness notice under this section is a notice advising the person on whom it is served of the existence of a category 1 hazard on the residential premises concerned which arises as a result of a deficiency on the premises in respect of which the notice is served.
The notice may not, by virtue of subsection (3)(b) or (c), be served in respect of any part of the building or its external common parts that is not included in any residential premises on which the hazard exists, unless the authority are satisfied—
A notice under this section may relate to more than one category 1 hazard on the same premises or in the same building containing one or more flats.
A notice under this section must specify, in relation to the hazard (or each of the hazards) to which it relates—
Part 1 of Schedule 1 (which relates to the service of improvement notices and copies of such notices) applies to a notice under this section as if it were an improvement notice.
For that purpose, any reference in that Part of that Schedule to "the specified premises" is, in relation to a hazard awareness notice under this section, a reference to the premises specified under subsection (6)(c).