"If we receive teachings against the teacher's wish, or without first checking whether he has agreed, or we use various means to oblige the teacher to give us teachings without being sure whether he considers those teachings suitable for us, this will lead to a breach of samaya.
When the time is not ripe, using pressure or complaint.
To insist on getting the instructions leads to a breach of samaya.
The teacher knows the disciples capacity and therefore the most suitable teachings to give. So if we use different means such as cunning and insistence to get teachings against the teachers wishes, we will cause our samaya to degenerate.
i dont think this can really apply in any meaningful way to teacher student relationship unless it is extremely close relationship where you are in close contact with your teacher on a daily or weekly basis. the teacher in now adays wont most likely point a student coming to an empowerment that ''hey you cant attend''
ive heard there are some empowerments that require your own lamas recommendation, so it can be taken care that way.
also, if you ask to receive teachings or request and the teachers says yes, its not insisting, if the answer is no and you immeadiately try to persuade him giving you teachings, that would be insisting. on the other hand if you ask one year later '' am i ready now '' its not insisting.
so i think this kind of samaya breach is actually very hard to break. unless youre an a hole and dont know what respect and your limits are. i dont think many people really dare to insist
the master give some teaching. at least from my perspective you should be able to understand that the master knows better and take an humble attitude and devotion to the wishes and teachings of the master.