I haven't heard of Kokkina/Erenköy since I visited
this website a few minutes ago, but I take the liberty to assume the enclave
still exist.
I know mentioning on a website is not legal
documentation, but this must be the best source of information I have found so
far on Kokkina:
I asked the TRNC tourist office how to visit
Kokkina, but was told it is impossible since it's a military area.
To the best of my knowledge it must be a ghost
town, only inhabited by soldiers and perhaps the odd stubborn resident refusing
to leave his home.
Jesper