The AAA discount will be returning for the California-funded services: the Surfliner, Capitol Corridor and San Joaquin. Similar to how California handled retaining the 15% senior discount for age 62 and over and the student discounts, the California AAA discount will require use of a discount code that will be posted on the websites of the state services. I believe the goal is to have the California AAA discount in place by the end of March.
California Amtrak Discounts