As said above 18.3 covers the situation close in to the mark.

Also mentioned above is the call of "starboard" and "hold your course", this is also important. The "Starbord" call is not required, boats have to keep an eye out. The "hold your course" call is more important as it (in thory) communicates that the port tacker has decided what to do and so you need to wait for them to react. (it is still not a defence if there is a collission).

In this type of situation, you need to be carefull you are not accused of "hunting" the port tacker if there was an incident; The safer way it to slow down and force them to tack earlier than they want to; you can then sail over the top of them.

Yes you can bear down below your course (to the mark) to "help" pursuade them to go behind you by making them think you are not on the layline. Or you can also pinch up hard to "help" them think you are laying the mark and so they tack early. You should do this when they are a fair way away to avoid the "hunting" problems.