(1)(a) When establishing a section, quarter-section, or center corners, the county surveyor or his designee shall set a monument of durable quality.

     (1)(b) Wherever the nature of the ground will not allow the setting of a monument at the exact corner as described, then a witness monument shall be set.

     (2)(a) Whenever possible, section corners and quarter-section corners shall be witnessed by at least four references of durable quality.

     (2)(b) All references shall be carefully described, and their bearings and distances noted in the report.