(a) Except as otherwise proved by this Rule, discovery shall be by leave of court only for cause shown. Nothing in these rules shall prohibit an agreement among the parties regarding discovery not otherwise authorized by these rules.(b) In all cases involving commercial property, the taxing authorities may serve a copy of Tax Assessment Appeal Discovery Requests, (FORM 5000.3) on the taxpayer. The taxpayer shall furnish the information sought in the Discovery Requests as set forth in Local Rule 5000.5.(c) Any discovery disputes, including, without limitation, any motions for protective order or motions to compel, shall be presented upon proper notice to the judge assigned to the case.(d) A party may inspect the property at a reasonable time(s) upon the condition that such party provides written notice of the inspection no less than twenty (20) days prior to the property owner, if unrepresented, or the counsel of record for the property owner. If the property owner objects to the inspection or the time for inspection set forth in the notice, the property owner shall file written objections to such inspection and present such objections to the assigned judge. Amended effective 1/1/2022 In the absence of a statewide rule, local rule, or order of court, it is within the sound discretion of the trial court whether to permit or refuse discovery in tax assessment appeals. Tanglwood Lakes Community Association v. Pike County Board of Assessment, 642 A.2d 581 (Pa. Commw. Ct. 1994) .