Warrants and warrant checks shall be signed by the chairman, mayor, president, trustee, director or other chief official, or in the absence of such officer, by the officer authorized by law to act in such officer’s stead, and by the clerk, secretary or auditor or like officer, and the seal, if any, of the municipality need not be attached or impressed or shown by facsimile: Provided, That in manager cities the manager and director of finance, or similar officer, if there be one, shall sign the warrants or warrant checks: Provided further, That a facsimile signature may be used when authorized by the official or officer as provided by article 40 of chapter 75 of the Kansas Statutes Annotated.