Sec.  1.1313   Objections.

   (a)  In  the  case  of  an  application to which section 309(b) of the
   Communications Act applies, objections based on environmental considerations
   shall be filed as petitions to deny.

   (b) Informal objections which are based on environmental considerations must
   be  filed  prior  to  grant  of  the  construction permit, or prior to
   authorization for facilities that do not require construction permits, or
   pursuant to the applicable rules governing services subject to lotteries.