Since the extent of the state action (and the extent of the Establishment Clause violation) is limited to that part of the CPU fulfilling the Postal Service's mandated public function, a sufficient remedy need extend no further or elsewhere. Here, the public functions include the acceptance of mail, the processing of mail and packages for delivery, and the sale of postal goods and services. These are performed or fulfilled at the postal counter, in the post office boxes, and on the shelving housing postal products; so the postal counter and the surfaces of the post office boxes and shelving units are zones in which the function of religious outreach is out of place. The postal counter, post office boxes and shelving units must therefore be free of prayer cards and messages and must be cleared of religious material. Since the disclaimer is helpful in differentiating the public space and function from the private one, it should remain.
In order to differentiate the primary area serving the public function from the remainder of the space operating as a private ministry, SYI is directed to create and install a barrier in front of the postal counter that is a visual cue and gives a sense of passage from one area of the space into another, thereby delineating space exclusively dedicated to the public function from space dedicated to other things. Separation and visual cues will not keep the video from being seen and overheard by postal patrons, but the source will unambiguously emanate from a zone distinct from the post office functions. We need not prescribe the specifications of the barrier, but it would do to use such things as stanchions with hanging ropes (of the kind used in a theater), or a low railing. Once the postal counter is cleared and visual cues installed, no more is required to cure the Establishment Clause violation.