Validations heretofore effected by legislative enactment of defective or irregular procedure in the creation, execution, or issuance of bonds or any other forms of public securities of any    municipality, and validations of debts, bonds, or other public securities of such municipalities theretofore contracted or issued without authority previously existing therefor, shall continue unaffected by the repeal or by the consolidation and revision of any validating act. Any debts, bonds, or other public securities may be funded or refunded under the provisions of title 21.