Thanks. Do you know where I find these days designated as premium? I assume this is what it is...

23.U.9. Additional On Call Reserve Day
a. A pilot awarded an additional on-call reserve day will receive an additional reserve
pro-rata share (e.g., 1/16th, 1/17th , or 1/18th, as applicable).
b. A pilot awarded an additional on-call day designated as premium will receive the
greater of:
1) 7:00 pay, no credit, or
2) Single pay, no credit for the value of the duty period(s) flown on the additional
on-call day.