The agreement and a certified copy of the resolution of each subdivision shall be filed with the secretary of state. If the agreement conforms to the requirements of this chapter the secretary of state shall file it and issue a certificate of incorporation, which shall state the name of the authority and the date of incorporation. The existence of the authority as a political subdivision of this state shall begin upon the issuance of the certificate of incorporation. The certificate of incorporation shall be conclusive evidence of the existence of the authority.
SDCL 49-17A-4