(a) Within the six-month period immediately following approval of the trustee's bond, any person who has a claim against the district shall present the claim duly verified to the trustee, and if the trustee finds that the claim is correct, he shall allow the claim, and the claimant shall file the claim with the clerk of the commissioners court before the beginning of the 20-day period immediately preceding the next regular meeting of the commissioners court.
(b) The clerk shall immediately issue notice of the filing to all persons interested in the district, and the notice shall be posted in three public places and at the courthouse door before the beginning of the 20-day period immediately preceding the next regular meeting of the commissioners court.