BUR #3945 has been rejected.
I couldn't find when this alias was made, but it needs to be undone. Suntan is the proper term for skin browned by exposure to ultraviolet rays. Tan is too ambiguous a name, resulting in it being used for any character with light brown skin, regardless of whether it can be confirmed to be natural or not.
If this one is approved, I'll make a second request aliasing tan -> suntan
EDIT: Changed the BUR to a single step reversal as per the new function listed in forum #176795
Updated