specify whether marker implies markers by default

An annoying occurance i've come across a few times is saying marker instead of markers and how it may be used in trick orders. wardens could say marker and not say marker doesn't imply markers, and kill those who go, while another warden can say marker without saying its implied and kill those who don't go. It doesn't really seem fair.
I've brought it up before in Jailbreak servers and people agreed.
Could we please have somewhere in the rules specify whether marker implies markers or not unless warden says the opposite?