under no circumstances are overhead / deadside joins allowed
LA I did not read that specific part and am more talking in general yes in the situation of " under no circumstances" Then comply with that requirement.
I also note the distinction between a pilot being checked out/under training and the carrying of PAX where you are trying to make the flight as short and smooth as possible as well as trying to mix a fast twin in with slow Cessna 150s.
Flying into say Gloucester where there is a standard join in a twin it was very rare to fly the standard join.
Atc where possible preferred fast aircraft to join left or right base or ideally straight in with a request to call at 4 miles.
Obviously Gloucester have ATC