On completing their inquiries under section 62, the local housing authority shall notify the applicant of their decision on the question whether he is homeless or threatened with homelessness.
If they notify him that their decision is that he is homeless or threatened with homelessness, they shall at the same time notify him of their decision on the question whether he has a priority need.
If they notify him that their decision is that he has a priority need, they shall at the same time notify him—
If the local housing authority notify the applicant—
they shall at the same time notify him of their reasons.
The notice required to be given to a person under this section shall be given in writing and shall, if not received by him, be treated as having been given to him only if it is made available at the authority's office for a reasonable period for collection by him or on his behalf.