Here's an example (ICALP): > Authors are strongly encouraged to also make full versions of their submissions freely accessible in an on-line repository such as

Here's an example (ICALP): > Authors are strongly encouraged to also make full versions of their submissions freely accessible in an on-line repository such as ArXiv, HAL, ECCC. This is from the call for papers a few years ago. The wording has changed in recent CFPs, due to employing (weak) double-blind reviewing. They still allow uploading to arXiv (with full names and affiliations) despite being anonymous.