Each mobile home park shall be completely enclosed along the boundaries not adjacent to a public street by either a continuous fence or shrubbery in accordance with the following:
(a) If a fence is used, such fence shall have a height of not less than four (4) feet and shall be maintained in a neat, clean, orderly manner, or
(b) If shrubbery is used, it shall be of such a type, and planted in such a manner that the shrubs will reach a height of not less than four (4) feet and will grow towards each other to result in a solid hedge in a years time. Such hedge shall be kept trimmed and maintained in a neat, clean, and orderly manner.
(c) Either the fence or the shrubbery shall be of a type that is seventy-five (75) per cent or more opaque.