(A) When the city has effected the removal of such dangerous litter or has paid for its removal, the actual cost thereof shall be billed to the person or persons responsible for payment.
(B) If the full amount due the city is not paid within 30 days after the mailing of the bill therefor, a single lot assessment shall be levied against the premises in the manner provided in Chapter 33 (Special Assessments).
(1991 Code, § 6.73)