b. Air traffic control specialists whose primary duties are those directly related to the control and separation of aircraft must meet the following criteria:
1. Do not work more than 10 operational hours in a shift.
2. Hours worked before a shift, whether operational or not, will count as operational hours.
3. All work beyond 10 hours must be nonoperational.
4. Have at least an 8-hour break from the time work ends to the start of any shift, except as follows: [9 hours before a day shift]
...snip...
11. Do not work more than six shifts without taking a regular day off.
12. Have at least 30 consecutive hours off-duty within each seven-day period.
13. Authorized leave, compensatory time used, and credit hours used are considered hours of work.