In general

Except as provided in paragraph (2), nothing in this section shall preclude a public housing agency, after submitting a plan to the Secretary in accordance with this section, from amending or modifying any policy, rule, regulation, or plan of the public housing agency, except that a significant amendment or modification may not—

(A) be adopted, other than at a duly called meeting of board of directors (or similar governing body) of the public housing agency that is open to the public; and

(B) be implemented, until notification of the amendment or modification is provided to the Secretary and approved in accordance with subsection (i).