A320 High speed protection.

[B737NG_Pilot]

From the A320 FCOM DSC-27-20-10-20

1. At high altitude, this may result in activation of the angle of attack protection. Depending on the ELAC standard, the crew may have to push on the stick to get out of this protection law. What is the meaning of "depending on the ELAC standard"?
2. On the A320 THS setting is limited between the setting at the aircraft’s entry into this protection and 11 ° nose-up, whereas on the A321 pitch trim is frozen? Why?