(a) Shall describe the sewer system or the part or parts of the sewer
system for which such rents shall be established and imposed.
(b) Shall prescribe the basis of the charge for such rents.
(c) Shall provide for the date or dates on which sewer rents shall
become due and payable.
(d) May provide for penalties for sewer rents in arrears or for
discounts for the prompt payment of such rents, or for both penalties
and discounts.