S.D. Codified Laws § 1-16J-14
Any revenue bonds or notes shall be secured as provided in the authorizing resolution which may, notwithstanding any other provision of this chapter, include in addition to any other security, a specific pledge or assignment of and lien on, or security interest in, any or all revenues or money of the authority from whatever source that may by law be used for debt service purposes and a specific pledge or assignment of, and lien on, or security interest in, any funds or accounts established or provided for by resolution of the authority authorizing the issuance of any such revenue bond, note, or other instrument. Any pledge made by the authority of revenues or other moneys received or to be received by the authority pursuant to an agreement with a governmental agency relating to a project to pay any revenue bond, note, or other evidence of indebtedness of the authority is binding from the time the pledge is made. Revenues and other moneys received or to be received by the authority pursuant to an agreement with a governmental agency relating to a project so pledged to pay any revenue bond, note, or other evidence of indebtedness of the authority shall be held outside of the state treasury and in the custody of the authority or a trustee or a depository appointed by the authority. Revenues or other moneys received or to be received by the authority pursuant to an agreement with a governmental agency relating to a project so pledged to pay any revenue bond, note, or other evidence of indebtedness of the authority and thereafter received by the authority or such trustee or depository shall immediately be subject to the lien of the pledge without any physical delivery thereof or further act, and the lien of any pledge is binding against all parties having claims of any kind of tort, contract, or otherwise against the authority or the State of South Dakota, irrespective of whether the parties have notice thereof. Neither the resolution nor any other instrument by which a pledge is created need be filed or recorded except in the records of the authority.
SDCL 1-16J-14