18.104.22.168.3 Each property that produces oil, gas, or geothermal resources and each oil, gas or geothermal resource well and tank, or other approved crude oil measuring facility where tanks are not utilized thereon, shall at all times be clearly identified as follows: 1. A sign shall be posted at the principal entrance to each such property which shall show the name by which the property is commonly known and is carried on the records of the commission, the name of the operator, and the number of acres in the property. 2. A sign shall be posted at each well site which shall show the name of the property, the name of the operator, and the well number. 3. A sign shall be posted at or painted on each oil stock tank and on each remotely located satellite tank, or on each approved crude oil measuring facility where tanks are not utilized, that is located on or serving each property, which signs shall show, in addition to the information provided for in paragraph (1) of this section, the commission lease number for the formation from which oil in the tank, or in an approved crude oil measuring facility, is produced, and where oil from more than one formation is commingled in the same tank, or in an approved crude oil measuring facility, the sign shall show the number of the commission permit that authorized the commingling of the oil; provided that, if there is more than one tank in a battery which contains oil from only one formation or oil from different formations that is commingled pursuant to a single commingling permit, it will not be necessary for the sign to be posted at or painted on each tank if the sign posted at or painted on a tank in the battery shows the required information and clearly identifies, by tanks number or otherwise, the tanks to which the information is applicable. 4. If a well is separately completed in two or more producing formations, the wellhead valve and flow line serving each separate formation shall be identified by a metal tag or other lettering attached to or painted on either the valve or flow line which shows the name of the formation and identifies the completion string of casing or tubing, as for example "c" for casing; "UT" for upper tubing; "LT" for lower tubing, etc., each being preceded or followed by the name of the producing formation. 5. The signs and identification required by this section shall be in English language, clearly legible, and in the case of the signs required by paragraphs,(1),(2) and (3) of this section shall be in letters and numbers at least one inch in height.