It was an earlier version of the sports exemption for up to 30 to participants will be where FE get their limit from (and NT and Wales)
Yes, they got the limit from earlier legislation and did not revise it in response to further legislation/rules changes intended to allow sports to continue. I don't recall the September legislation stating that 'Covid-safe' meant complying with the 'rule of six'. Indeed, the provision for team sports suggests not. But this may have been communicated through other channels. Or it may have been too obvious for me to notice.
Frustrating. And unnecessary.