323. Notwithstanding any legislative provision to the contrary, every municipality shall pay to the school board the contributions or subsidies that are given in lieu of the school tax within 15 days of their collection.
Where a municipality receives a partial payment, it shall, within the same time limit, pay a part of that payment to the school board proportionate to the ratio between the amount owing as school tax and the total amount.
Every amount remitted after the time limit bears interest at the rate prescribed under the fourth paragraph of section 322.