Castleford have agreed a new dual-registration partner for 2020.
The Tigers will link up with Championship side York in a deal that will see the Knights able to call upon players not selected by Daryl Powell.
The two clubs previously previously worked together in 2012, 2014 and 2015, and the relationship helped develop the careers of John Davies, Ben Johnston and Ben Reynolds.
Cas director of Rugby Jon Wells said: “We are delighted to enter into a dual registration partnership with the York City Knights for the 2020 season.
“With this partnership and the return of the reserve grade system for next season we can ensure playing opportunities right across all ages and experience levels.
“The two clubs will work closely with one another and we feel this will be a benefit to both.”
Knights coach James Ford said: “It’s a positive step for us to link up with Castleford.
“I’m confident we can build an excellent relationship where both clubs benefit on and off the field.”