bluenikki, on 2019-October-14, 13:38, said:
A sectional acbl tournament director said this was illegal because the partners were required to play the same system.
The law says that "agreed meaning of a call or play shall not alter by reference to the member of the partnership by whom it is made (this requirement does not restrict style and judgement, only method)." A variance from agreed call based upon judgement or style does not imply or constitute a different method, IMO - assuming that by "light" you intend willingness to open hands that are downright ugly but exceed the agreed HCP requirements or to open most hands that reach the lower limit of HCP. If you intend consistently violating the agreed HCP limits then that is another matter of course.