After the investigation and report and a finding of eligibility, aid as defined in sub. (1) shall be granted by the county department under s. 46.215 or 46.22 as the best interest of the child requires. No such aid shall be furnished any person for any period during which that person is receiving supplemental security income or for any month if, on the last day of the month, that person is participating in a strike or to any person who fails to apply for or provide such social security account numbers as required by federal law.

If the county department under s. 46.215 or 46.22 finds a person eligible for aid under this section, that county department shall, on a form to be prescribed by the department, direct the payment of such aid by order upon the secretary of administration. Payment of aid shall be made monthly, based on a calendar month or fiscal month as defined by the department; except that the director of the county department may, in his or her discretion for the purpose of protecting the public, direct that the monthly allowance be paid in accordance with sub. (5) (c).