Here are a couple that are a little bit of a stretch.
110.26(F)(2) Outdoor. Outdoor electrical equipment shall be installed in suitable enclosures and shall be protected from accidental contact by unauthorized personnel, or by vehicular traffic, or by accidental spillage or leakage from piping systems. The working clearance space shall include the zone described in 110.26(A). No architectural appurtenance or other equipment shall be located in this zone.
Could we consider the retaining wall a "architectural appurtenance"?
110.26(C)(1) Minimum Required. At least one entrance of sufficient area shall be provided to give access to working space about electrical equipment.
A real stretch but what do you have to do to gain entrance to the working space, walk along the top of the wall?
Accessible, Readily (Readily Accessible). Capable of being reached quickly for operation, renewal, or inspections without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders, and so forth.