Colorado Revised Statutes Title 30. Government County § 30-20-625. No action maintainable--exception--grounds--limitations

(1) No legal or equitable action shall be brought or maintained to enjoin the collection of assessments levied under this part 6 except upon the grounds:

(2) No action shall be brought under paragraph (c) of subsection (1) of this section unless the objections on which such action is based have been presented to the board in writing prior to the hearing on the proposed improvements as provided in section 30-20-603(6)(i). Any action brought with respect to the ordering of any improvements, the creation of any district, the authorization or issuance of any bonds, the levying of any assessments, or any other action taken under this part 6 shall be commenced within thirty days after the effective date of the resolution ordering the improvements, creating the district, authorizing or issuing bonds, or levying assessments or the performance of any other action complained of or else shall be thereafter perpetually barred.