There are three geographical subspecies: Sciurus griseus griseus (central Washington to the western Sierra Nevada in central California); S. g. nigripes (from south of San Francisco Bay to San Luis Obispo County, California; and S. g. anthonyi, which ranges from San Luis Obispo to northern Baja California).
Unity of command is ensuring unity of effort under one responsible person (or commander) for completing a task. This unity of command is one of the twelve principles of joint operations, and is defined as:
(b) Chain-of-Command - The chain-of-command is an organized hierarchy of authority. (c) Unity of Command - Unity of command means that everyone reports to one person. and one person is in charge of each function. (d) Span of Control - The optimum span of control ratio is 1:5, which is one supervisor. to five subordinates. The span of control can range from a ratio of 1:3 to 1:7 while. maintaining effective control.