When the Rothschilds sold the estate to the Boroughs of Acton and Ealing, they attached a Covenant, dated 11 December 1926, which stated that:

'they the Purchasers their successors and assigns will not except as hereinafter mentioned use the hereditaments hereby conveyed for any purpose other than
as a public park or sports ground and that the mansion houses and buildings on the property shall not at any time hereafter be used except for such public purpose
as may be ancillary to the use of the property as aforesaid.'

The Rothschilds wanted the Park to be free of commercial usage in perpetuity, and their purpose in drafting the Covenant was to ensure that there would remain a body
of independent citizens with a direct tangible interest in the Park, who would be in a position to act on their behalf, but more importantly on behalf of the public at large
who use the Park, for the purpose of having a voice in developments in the Park. Such a collection of local citizens, they felt, would act to ensure that the Park is maintained
and managed in a way that reflects its character, and in opposing and preventing inappropriate and harmful innovations. Covenantors should use what powers exist
(and are expressly at our disposal in the provisions of the Covenant) to maintain the essential nature of the Park as a place of recreation and public use.