The Commission System supports the Grace Church's Mission and offers a considerable opportunity for personal contributions by parishioners. The principle areas of parish activity are assigned to separate Commissions. Commissions are composed of committees, which are formed and led by parishioners according to their interest and talents. The purpose of the committees is to carry out the responsibilities of meeting the Commissions' goals.

Each Commission is normally chaired by a Vestry member and is composed of either committee chairpersons or a designated representative. All Vestry members are members of at least one Commission, though Commissions can include other interested persons.

Through this system, it is the Vestry's intention to involve as many people as possible in the planning and work of the church at every level, to make a conscious effort to avoid overworking particular individuals, and to rotate the leadership positions among parish members. To further these intentions it shall be the policy, whenever feasible, to rotate Commission and committee chairpersons on a two-year basis.

The Grace Church Commission System supports the church mission as follows: