The parties must be divorced in Montgomery County in order to modify a parenting time schedule. In order to modify a parenting time schedule; there must be a motion filed with the Court. The motion must be set for hearing and served on the opposing party.
You may hire the attorney or your choice to file said motion or file self-represented. Refer to Local Rules 4.09 (H) and 4.41 (D) (PDF) for the required forms and content of said motion.
If filing self-represented; refer to the Forms section of the Local Rules. If you are not using an attorney; then your document must be submitted to the DR Compliance Office for review.