Mazda 1990 323 Workshop Manual Supplement page 23

Note
I . . . . Inspect, and if necessary correct, clean, or replace
A..., Adjust
R.... Replace or change
T.... Tighten
After 60 months or 60,000 miles (96,000 km), continue to follow the described maintenance at the recommended intervals.
As for * marked items in this maintenance chart, note the following points:
*l Replacement of the timing belt is required every 60,000 miles (96,000 km). Failure to replace the timing belt may result in damage to the engine.
*2 This maintenance is required for all states except California. However, we recommend that it also be performed on California vehicles.
*3 This maintenance is recommended by Mazda. However, it is not necessary for emission warranty coverage or manufacturer recall liability.