Section 3(3)(a) in The Maharashtra Housing and Area Development Authority Employees (Determination of Seniority) Regulations, 1987
(a)If a direct recruit, who has been given a higher rank by the selecting authority, joins the authority service after the direct recruit who has been given a lower rank by the selecting authority but within a period of one month from the date of receipt of the appointment order by him or within such further period as may be permitted in writing by authority competent in this behalf he shall not lose his seniority in spite of the fact that the date of his joining the service is subsequent to the date of joining of a person who is junior in rank to him. Such a person shall be allotted a deemed date of joining which would be one day earlier than the date of joining of person who is junior in rank to him in the selection list.