The Rugby Football League and its member clubs have agreed to change the transfer deadline day from July 27 to August 9.
The changes to the competition structure for 2019 have allowed a number of changes to signings and registration deadlines.
The deadline for signing players for the season, when the deadline was July 27 to cornice with the end of the regular season, will now revert to Friday, August 9 across Super League, Championship and League One.
At that stage there will be only four rounds of the regular season remaining in the Championship and League One, and five in the Super League.
The cut-off for dual registration will follow on Monday, August 12. After that point, players will only be eligible to move between two clubs if they have already made four appearances on dual-registration.
If not, they would be able to play either for their parent club, or to move on loan for the rest of the season to their dual-registration club – but not both.
The third change, and the one that will take effect first, is the signing deadline for the Challenge Cup and the 1895 Cup.
For both competitions, that deadline will be Friday July 19 – eight days before the Challenge Cup semi-finals, and nine before the 1895 Cup semi-finals.