Questions about discount codes.

Tried looking for myself but got no results. So my first question is - does the discount code have a timer on it or can I just save it for when I want to use it?
Which bring my second question, how do I access the same promo code in the future if Warmane's link disappears?
Thanks.

Dunno about your first question, but in regards to your first - copy it down in a few locations in case it does go away or you lose it

https://www.warmane.com/account/history -> Promotions