No County liability shall be incurred or contracted by any department, agency, or employee and no bill or invoice shall be approved or paid, unless the Council has authorized by budget adoption or a specific appropriation to cover payment out of public funds. In addition to the requirements set forth above in Subsection (a) of this Section, no County liability shall be incurred or contracted by any department, agency, or employee and no bill or invoice shall be approved or paid for any multiyear contract not submitted, reviewed, and approved by the County Council pursuant to the notice and hearing prescriptions set forth in Section 819 of the County Charter and Section 10-105 of this Code. Any person willfully violating this provision shall be deemed to be responsible for the contract, debt, or expenditure. The head of the department allowing such action shall be subject to such disciplinary action as the Council shall determine.