This is an extract from "Cricket in Black and White: 110 Not Out: The history of Western Suburbs District Cricket Club. Published in 2006.

In 1989, the Sydney Cricket Association Committee of Management was charged with producing a report that would recommend the number of clubs that should compete in Grade cricket, and the areas in which those clubs should be located. That report recommended that there should be sixteen clubs, and that only one should come from the inner-western suburbs where Wests and Petersham-Marrickville were based.

https://www.cricconnect.com/profile/161/western-suburbs-district-cricket-club-sydney/blog/2310/clubs-are-going-to-go-sydney-cricket-association