Why traders don't pay?

[jammi]

I've just realized there's something like this:

3.3 Aggressors are not allowed to issue further demands during the same encounter after the trade vessel has complied, or destroy a trade vessel prior to issuing a demand, in system or local chat. "Halt" on its own is not a demand, however, a trade vessel can be destroyed if they refuse to stop after being asked to in the form of a proper demand.

However, the explanation is needed here. If halting vessel is not a demand, then what is? What if I drop line "Cut your engines or your actions will result in your immediate termination"?

This wording is to stop someone solely saying "halt", waiting 10 seconds and opening up. Yes, if you use a slightly more elaborate request it's valid to kill a transport if they don't stop moving. It's no different than attacking after "engaging" (not allowed) and "hostile sighted, moving in to engage" (slightly more acceptable, albeit barely).