If in proceedings under this Part it is alleged that the inmates of a house or part of a house are members of the same family, the burden of proving that allegation rests on the person by whom it is made.
In proceedings under this Part a document purporting to be a copy of an entry in the register of common lodging houses and purporting to be certified as such by the proper officer of the local housing authority shall be prima facie evidence of the matters recorded in the entry.
The proper officer of the local housing authority shall supply such a certified copy free of charge to any person who applies for it at a reasonable hour.