Once you have a terrain that you think is bug free & ready for the main you need to send it with all the files to HTC for testing/approval.
There have been a LOT of maps approved.
Especially for the CT.
A good way to test a map is to host a H2H session. There are always a lot of new maps there & people are ussually pretty good at spotting problems.
Remember for a main type map it needs to be balanced so one side doesn't have any big advantages.
There should be more on this in the TE forum, if you search back a ways.