A priest from outside the parish should generally be allowed to celebrate the various rites of the Funeral Liturgy when a reasonable request is made. (CIC 265). He must abide by the policies established by the pastor and the Archdiocese of Baltimore.
A) Any priest who wishes to celebrate a Funeral Liturgy must have obtained faculties from the Archdiocese of Baltimore to do so. Priests from outside the Archdiocese of Baltimore must obtain at least Event Faculties before being permitted to minister in any way within the territory of the Archdiocese.
B) The pastor of the parish is responsible for making certain the proper faculties have been obtained prior to allowing any extern priest to minister in his territory. For more information see http://www.archbalt.org/vocations/priests/event-faculties.cfm.