I see the following statements in Arphic Public License:
- Automatic Receipt
Each time you redistribute the Font, the recipient automatically receives a license from the original licensor to copy, distribute or modify the Font subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License.
English is not my native language. I don't want to mis-interpret it. My understanding is that it describes how the APL license propagates between users. It doesn't imply any extra physical documents besides the APL license itself.