The 'cop' apparently didn't think the somewhat sheer straps counted as 'straps.'
But you live in Utah...what do you expect?
If the rules did not forbid sheer straps then tough noogies to the dress police. There is a general rule when writing rules. Unless a definition is given in the rule then the accepted definition found in a general use dictionary is the one to be used. So unless strap is defined as being of non-sheer material in the rule the accepted one found in the dictionary or in any seamstress’ lexicon is the one to use.
The articles I read all focused on the width of the strap and not the material. Thanks for pointing that discrepancy out.