Officials and employees of the City shall be entitled to reimbursement of expenditures incurred while on official business for the City which shall include, but are not limited by this reference to, expenses for transportation, lodging, meals, tips and other expenses related to such official business. “Official business” includes, but is not limited by this reference to, officially assigned duties, travel for approved public purposes, meetings concerning city business, training and educational seminars, attendance at conferences and other sessions involving municipal affairs and other activities concerning the business of the City. No claim for reimbursement of any expenditures by officials and employees of the City shall be allowed unless the same is presented in a detailed account and shall be duly certified by the official or employee submitting the claim on forms and in the manner prescribed by the City. The extent of reimbursement, establishment of a per diem allowance in lieu of itemization of expenses, the rules, procedures and forms to be used for reimbursement shall be established from time to time by the City Council as they deem necessary. Notwithstanding the foregoing provision, nothing shall prohibit or in any way limit the City Council from delegating rule-making authorization to appropriate officials or employees of the City. (Ord. 935 § 1, 1980: Ord. 685 § 23, 1975).