Model change allowed?

[gibi]

Hi i would like 2 know if modelchangeing is not allowed or can i change my model without any problems? thx sorry 4 bad english :P

[Zokmag]

Yes it is if you dont get avertage (dont word maby missspelld (and maby this one too)) like you remove a mountain and can walk throw it when other people cant like chaning a human male to orc female is allowed (i think)