Section 29.47.240 - Revenue bonds(a) A municipality may issue negotiable or nonnegotiable revenue bonds for a public enterprise or public corporation of the municipality where the only security is the revenue of the public enterprise or corporation.(b) A municipality may issue its revenue bonds to finance the purchase of residential mortgage loans. The revenue bonds issued under this subsection are payable solely from the principal and interest of the mortgage loans and from other amounts pledged by the municipality, except the pledge of revenues derived from taxes. Revenue bonds issued under this subsection do not constitute a general obligation of the municipality.