The sign described in this section shall be displayed in a prominent place adjacent to or on the pumping unit or fence and shall be visible at all times and maintained in good condition from the time drilling of a well is started until abandonment of the well. The sign shall be one having a surface area of not less than two square feet bearing the current name and number of the well, the name and/or the insignia of the operator and at least two names and telephone numbers of pumpers or operators of the well who may be contacted during any 24 hour period for emergency reasons.
(`78 Code, § 14.16.130.)