In exercising any powers or carrying out any authorization contained in this part, a housing authority may comply with any conditions not inconsistent with the purposes of this part required by the federal government pursuant to federal law in any contract relating to projects developed or administered under this part. A housing authority may exercise its powers and may do any and all other things necessary or desirable to cooperate with or secure the financial aid of the federal government in the expeditious development or in the administration of projects to assure the availability of safe and sanitary dwellings for persons engaged in national defense activities and to house servicemen and returning veterans and their families, to act as agent or lessee for the federal government in the development or administration of such projects by the federal government, and to effectuate the purposes of this part. A housing authority may function hereunder upon a finding or determination by the governing body of the municipality for which the housing authority was created, which finding or determination shall be in lieu of any finding or determination required by this chapter and shall be conclusive in any suit, action or proceeding, that there exists or impends in the locality an acute shortage of safe and sanitary dwellings available to persons engaged in national defense activities.