The Police Service of Northern Ireland (PSNI) director general, Boutcher, initiated a formal request under section nine of the Public Processions (Northern Ireland) Act 1998 to have the Northern Ireland Secretary reconsider the current ruling on the Drumcree march.
Sir Chris Bryant holds statutory authority to either uphold, modify or cancel the Parades Commission's determination following such an application.
The scheduled procession from Drumcree Church into Portadown was cancelled after significant demonstrations occurred on Garvaghy Road last month.
Unionist representatives are urging government officials to take measures against First Minister Michelle O'Neill and other senior Sinn Féin figures involved in those recent protests.
This marks the thirteenth day of impasse between residents living on Garvaghy Road and members of the Orange Order's local district lodge.
Although Boutcher launched the legal challenge earlier this Friday, no final conclusion has been reached by the Secretary of State yet.
The official statement from the police force did not specify which individual would receive the notification letter.
Neither the PSNI nor the Northern Ireland Office has issued a public comment on these developments so far.
Reports indicate that Sir Chris Bryant is currently engaging in discussions with Boutcher and the Parades Commission to assess the situation.