It will allow clubs whose application is successful to offer a licensed safe standing area.
Since 1994, first- and second-tier grounds in England and Wales have been required to be all-seated by law.
Standing in English football’s top two divisions was outlawed following recommendations made in the Taylor Report into the 1989 Hillsborough disaster, which resulted in the death of 97 Liverpool fans.
The SGSA, the body in charge of ground safety, did not name the six clubs, with the approval process now ongoing. The list of approved clubs is expected to be announced early next month.