what is the rule of Bismillah between two surahs?

Question
what is the rule of Bismillah between two surahs?
Answer
The rules of the basmalah between two surahs for Hafs can be found at the following link:
http://www.abouttajweed.com/index.php/tajweed-rules/31-seeking-refuge-and-the-basmalah-in-recitation/17-the-basmalah-between-two-surahs