I have check the forum rules regarding the signature, it is clearly stated down that they allows 2 lines with no links limit. Check the details as below, I hope this clear your doubts.

1. No obscene websites and words like adult, warez and so on.

2. Tiny Url and such redirect services are forbid for preventing redirection to obscene sites.

3. Regular members can have 2 lines at maximum with no links limit but no banner/images (except smilies). Diamond members can have up to 4 lines with 2 banners/images allowed.

4. font size must not be larger than 2, color, bold, italic, and underline are enabled.

5. if someone abuse this feature, we might disable it.

thats all so far.