These permits have been implemented by the Indian Government in an effort to regulate movement in certain areas located near the international borders of India. appropriate documentation required for visiting such places.

You will find latest information here http://www.mdoner.gov.in/content/rappap-restrictedprotected-area-permit

Important For Diplomats
All permits to be applied to and issued from the Ministry of Home Affairs at New Delhi.

State Area Permit Type Remarks
Andaman and Nicobar Municipal Area, Port Blair RAP Stay Allowed
  Havelock Island,Long,Neil Island, Jolly Bouy, South and North Cinque, Red Skin, Mayabunder, Diglipur, Rangat, Mount Harriet, Madhuban RAP Only day visits allowed
Jammu and Kashmir Nubra Sub Division
Leh-Khardung La-Khalsar-Tirit up to Panasik, Leh-Khardung La-Khalsar up to Hunder, Leh-Sabo-Digar La-Digar-Labab-Khungru Gampa-Tangar 
PAP Only for trekking conducted by approved tour operators and accompanied by State Police personnel
  Noyona Sub Division
Leh-Upshi-Chusathang-Mahe-Puga-Tso-Moari Lake/Kozok, Leh-Upshi-Debring-Puga-Tso-Moari Lake/Korzok, Leh-Karu-Chang La-Durbuk-Tangtse-Lukung-Spanksik, Pangong
PAP Tourist groups are to travel on the identified tour circuits only. *Individual tourists not permitted, 7 days allowed.  Note: Groups should consist of 4 to 20 numbers and should be accompanied by a liaison officer.
  Nubra,Pangong/Da-Hanu
Nubra, Pangong and Da-Hanu areas
ILP Stay allowed
Himachal Pradesh Poo-Khab-Sumdho-Dhankar-Tabo-Gompa-Kaza ,Morang-Dabling  PAP Trekking groups only. Individuals not permitted.
Sikkim Gangtok, Rumtek, Phodang, Pemayangtse Khecheperi and Tashiging RAP Stay allowed
  Sikkim West - Dzongri RAP Groups allowed for 15 days trekking and are to be accompanied by a liaison officer. Individual tourists not permitted. 
  Sikkim East - Tsangu or Chhangu RAP Individual tourists not permitted. Day visit only.
  Sikkim North
Mangan, Tong, Singhik, Chungthang, Lachung and Yumthang 
RAP  
Arunachal Pradesh Itanagar, Ziro, Along, Pasighat, Miao, Namdapha and Sujesa (Puki) Bhalukpong PAP / ILP Individual tourists not permitted, 10 days allowed.
Manipur Loktak Lake, Imphal, Moirang INA Memorial, Keibul Deer Sanctuary and Waithe Lake. PAP Individual tourists not permitted, 6 days allowed.
Mizoram Vairangte, Thingdawl and Aizawl PAP / ILP Individual tourists not permitted, 10 days allowed.

 

Protected Area Permt(PAP)
This is an official travel document issued by the Government of India to allow inward travel of an Indian citizen into a protected/restricted area for a limited period.
Protected Area Permt (PAP)
This is required for non-Indian citizens to visit certain areas in India (mainly in the North-East).
Restricted Area Permit (RAP)
This is required for non-Indians to visit certain areas in India. As of 2009, RAPs are required for all visits to the Union Territory of Andaman and Nicobar Islands and certain parts of Sikkim.
Inner Line Permit (ILP)
Inner Line Permits are issued for certain restricted areas which all Indians and Foreigners have to obtain.