Missouri Revised Statutes Title XIV. Roads and Waterways § 228.374. Amending or modifying agreements or plans of maintenance by recorded agreement, when

1. A prior agreement or court order establishing a plan of maintenance may be amended or modified and may be restated at any time by a recorded agreement signed by all the homeowners or other benefitted owners.

2. No court proceeding under section 228.369 to amend, modify, or restate a plan of maintenance may be filed sooner than seven years from the entry of a prior order, except upon a prima facie showing that the real property benefitted by the private road has been developed or divided in a manner rendering the plan of maintenance obsolete or showing that the existing apportionment of the use and benefit to residences benefitted by the access to the private road is no longer equitable.