(A) In order to lessen practical difficulties and prevent unnecessary physical hardships, variances from the regulations may be granted. A practical difficulty or unnecessary physical hardship may result from the size, shape, or dimensions of a structure, or the location of the structure, from topographic or physical conditions on the site or in the immediate vicinity, or from other physical limitations, street locations, or traffic conditions in the immediate vicinity. Cost or inconvenience to the applicant of strict or literal compliance with a regulation shall not be a reason for granting a variance.
(B) With respect to signs or outdoor advertising, along Highway 290 or any other portion of the Interstate Highway system or federal-aid Primary Highway system within the city and/or its area of extraterritorial jurisdiction, which are subject to regulation under Tex. Transportation Code Chapter 391 and State Department of Highways and Public Transportation regulations, no variance shall be granted from spacing, size and lighting requirements when such would result in less stringent regulation than that provided for under those regulations.
(C) Except for the foregoing, a variance may be granted allowing minor exceptions to the regulations contained in this chapter, in those instances in which a substantial injustice would result unless the minor exceptions were granted in appropriate cases and subject to appropriate conditions and safeguards.