Believe CIP had its roots "Pay Demo" from earlier contracts. Here's Cliff notes I made from the NATCA book "Into the wind"
8/1/1993
4 year contract ratified. Like PATCO, NATCA found ways to increase pay since pay negotiations weren't legally negotiable.
In addition to the congressionally mandated 5 percent operational differential that The union built into its latest contract, about 2,100 controllers enjoyed a 20 percent bonus as part of a five-year Pay Demonstration Project.
"Pay Demo" - The premium was designed to attract and retain controllers at hard-to-staff facilities known in the profession as “The Magnificent Seven:” Chicago Center; O’Hare Tower/TRACON; New York Center and TRACON; Los Angeles Tower/TRACON; Coast TRACON in Santa Ana; and Bay TRACON in Northern California.
Flight Standards district offices in Los Angeles, Teterboro, New Jersey, and Farmingdale and Valley Stream, New York, also received the bonus.