com.l2jfrozen.gameserver.model.zone.type.L2PartyZone.java
=========================================================
 /*
  * This program is free software: you can redistribute it and/or modify it under
  * the terms of the GNU General Public License as published by the Free Software
  * Foundation, either version 3 of the License, or (at your option) any later
  * version.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
  * details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package com.l2jfrozen.gameserver.model.zone.type;

 import com.l2jfrozen.gameserver.datatables.csv.MapRegionTable;
 import com.l2jfrozen.gameserver.model.L2Character;
 import com.l2jfrozen.gameserver.model.actor.instance.L2PcInstance;
 import com.l2jfrozen.gameserver.model.zone.L2ZoneType;

 public class L2PartyZone extends L2ZoneType
 {

    /**
 	 * @param id
 	 */
 	public L2PartyZone(int id)
 	{
 		super(id);
 	}


    @Override
    protected void onEnter(L2Character character)
    {
        if (character instanceof L2PcInstance)
        {
     	   if(((L2PcInstance) character).getParty() != null)
     	   {
 	    	   ((L2PcInstance) character).setIsInsidePartyZone(true);
 	    	   ((L2PcInstance) character).sendMessage("You have entered a Party Zone. Prepare for fight.");
     	   }
     	   else
     	   {
     		   ((L2PcInstance) character).sendMessage("This is strict area for Party members ONLY. You will be teleported at the nearest town.");
     		   ((L2PcInstance) character).teleToLocation(MapRegionTable.TeleportWhereType.Town);
     	   }
        }
    }

    @Override
    protected void onExit(L2Character character)
    {
        if (character instanceof L2PcInstance)
        {
     	   ((L2PcInstance) character).setIsInsidePartyZone(false);
        }
    }


   @Override
    public void onDieInside(L2Character character)
    {

    }

    @Override
    public void onReviveInside(L2Character character)
    {
        onEnter(character);
    }
 }
=====================================================================
com.l2jfrozen.gameserver.model.L2Character.java
====================================================================
    /** The Constant ZONE_PARTYZONE. */
	public static final int ZONE_PARTYZONE = 16386;



		/**
		 * @return the _isInsidePartyZone
		 */
		public boolean isInsidePartyZone()
		{
			return isInsidePartyZone();
		}

		/**
		 * @param _isInsidePartyZone the _isInsidePartyZone to set
		 */
		public void setIsInsidePartyZone(boolean _isInsidePartyZone)
		{
			this._isInPartyZone = _isInsidePartyZone;
		}

======================================================
ZoneData.java
======================================================
import com.l2jfrozen.gameserver.model.zone.type.L2PartyZone;

	case "PartyZone":
	temp = new L2PartyZone(zoneId);
	break;
	}

==============================================
com.l2jfrozen.gameserver.network.serverpackets.Die.java
==============================================
com.l2jfrozen.gameserver.model.zone.type.L2PartyZone


(player.isInsideZone(L2Character.ZONE_PARTYZONE) && player.isPendingRevive()));

=================================================
com.l2jfrozen.gameserver.model.L2Party.java
=================================================
	public void removePartyMember(final String name)
	{
		final L2PcInstance player = getPlayerByName(name);

		if (player != null)
			removePartyMember(player);

		if (player.isInsidePartyZone())
		{
			if (getMemberCount() < 5)
			{
				getPartyMembers().forEach(s -> s.teleToLocation(MapRegionTable.TeleportWhereType.Town));
		}
		}
	}