(1)A person is homeless if he has no accommodation in Scotland, or England or Wales.
(2)A person is to be treated as having no accommodation if there is no accommodation which he, together with any other person who normally resides with him as a member of his family or in circumstances in which the local authority consider it reasonable for that person to reside with him—
(a)is entitled to occupy by virtue of an interest in it or by virtue of an order of a court, or
(b)has a right or permission, or an implied right or permission to occupy, or in England and Wales has an express or implied licence to occupy, or
(c)occupies as a residence by virtue of any enactment or rule of law giving him the right to remain in occupation or restricting the right of any other person to recover possession.
(3)A person is also homeless if he has accommodation but—
(a)he cannot secure entry to it, or
(b)it is probable that occupation of it will lead to violence from some other person residing in it or to threats of violence from some other person residing in it and likely to carry out the threats, or
(c)it consists of a movable structure, vehicle or vessel designed or adapted for human habitation and there is no place where he is entitled or permitted both to place it and to reside in it; or
(d)it is overcrowded within the meaning of section 135 and may endanger the health of the occupants.
(4)A person is threatened with homelessness if it is likely that he will become homeless within 28 days.