(a) All pleadings and papers submitted to the commissioner in connection with an appeal must be endorsed with the name, post office address and telephone number of the party submitting the same, or, if a party is represented by counsel, with the name, post office address and telephone number of the party's attorney.

(b) Notwithstanding the provisions of subdivision (a) of this section, in an appeal regarding a homeless child's or youth's access to a free, appropriate public education pursuant to section 100.2(x) of this Title, if the petitioner is the parent or guardian of a homeless child or youth or unaccompanied youth as defined in section 100.2(x) of this Title, the petitioner, in lieu of such endorsement, may endorse all pleadings and papers submitted to the commissioner in connection with an appeal with the name, post office address and telephone number of the local educational agency liaison for homeless children and youth.