The Country Side Homes Association is comprised of nine subdivisions (totaling 478 properties in all), each of which has its own organizing documents and history.  

Rockhill Park (currently contains 107 properties)
Plat (dated 4/24/1907; recorded 4/27/1907)
Resurvey (dated 8/27/1910; recorded 9/8/1910) *

Rockhill Park Extension (currently contains 103 properties)
Plat (dated 9/6/1907; recorded 9/6/1907)

Rockhill Place (currently contains 5 properties)
Plat (dated 11/23/1907; recorded 11/23/1907)

Country Side (currently contains 54 properties)
Plat (dated 4/22/1908; recorded 12/19/1910)

Country Side Extension (currently contains 7 properties)
Plat for Blocks 2 - 6 (dated 10/22/1908; recorded 10/24/1908) *
Plat for Blocks 7 - 10 (recorded 4/1/1909)

Bowling Green (currently contains 59 properties)
Plat (dated 3/23/1909; recorded 3/25/1909)
Corrected Plat (dated 6/10/1911; recorded 9/2/1911)
Plat for Lots 62 - 84 (dated 5/5/1911; recorded 7/17/1911)

Southwood Annex (currently contains 54 properties)
Plat (dated 6/10/1909; recorded 8/5/1909)

Southwood Extension (currently contains 84 properties)
Plat (recorded 3/19/1909) *

South Country Side (currently contains 5 properties)
Plat (dated 8/12/1914; recorded 8/22/1914) *

FYI -- the City of Kansas City, Missouri's Parcel Viewer displays public information about property ownership for the entire city.  

*  The May 3, 1948 landmark decision by the U.S. Supreme Court in Shelley v. Kraemer made it unconstitutional for states to enforce covenants in violation of the Fourtheenth Amendment.  The Federal Fair Housing Act of 1968 (42 U.S.C. §§3601–3619) went further, prohibiting the practice of writing covenants into deeds which are discriminatory on the basis of race, color, religion, or national origin.  Missouri passed its own law in 1993 (§442.403 R.S.Mo.) making such restrictive covenants void and unenforceable, and also removing liability for any any person or legal entity with an interest in real property (or any agent of such person/entity) created by the mere existence of such restrictive covenants in any documents recorded before May 3, 1948, but the state legislators didn't at that time create a procedure for how such language could be removed from existing deeds.   

That didn't stop the CSHA Board, however.  In 2020, under the authority of §213.040 R.S.Mo. and in observance of fair housing laws, the Board recorded Amendments to the Plats of the four subdivisions which contained illegal restrictive language:

Amendment to the Rockhill Park Illegal Declarations (recorded 12/9/2020)
Amendment to the Country Side Extension Illegal Declarations (recorded 12/9/2020)
Amendment to the Southwood Extension Illegal Declarations (recorded 12/9/2020)
Amendment to the South Country Side Illegal Declarations (recorded 12/9/2020)

On June 30, 2022, with HB 1662 (see the highlighted portion toward the end of the Bill), the Missouri legislature added to §442.403 R.S.Mo., stating that "No deed recorded on or after August 28, 2022, shall contain a reference to the specific portion of a restrictive covenant purporting to restrict the ownership or use of the property as prohibited under subsection 1 of this section [race, color, religion, or national origin of any person]."  This addition also finally created a framework for releasing such restrictions in existing recorded documents, providing language and format for a "Certificate of Release of Prohibited Covenants".