Crossing over of taxiway on the apron, legality.

[TwoTone-7]

Morning.

I'm operating out of an airport where routinely ATC are instructing aircraft to cross taxiway midway i.e not via taxi routes depicted on the charts for the aerodrome. It can be rather adhoc at times and instructions given such as "on taxiway L2, cross over onto L3" this cross over is a free style manoeuvre and not via say, taking L2 till the end making a turn an joining L3 properly.

Are there any legal implications of this?

Thanks!