About LAC:
- India shares 3488 Km of border with China that runs along the States of Jammu & Kashmir, Himachal Pradesh, Uttarakhand, Sikkim and Arunachal Pradesh.
- The border is not fully and officially demarcated.
- The Line of Actual Control (LAC) is a demarcation line that separates Indian-controlled territory from Chinese-controlled territory.
- LAC is currently the de-facto border between the two countries, and the process of clarifying and confirming the Line of Actual Control (LAC) is in progress.
- The Line of Actual Control (LAC), is divided into three sectors: western, middle and eastern.
Areas under LAC:
- The LAC traverses three areas —
- Western (Ladakh, Kashmir),
- middle (Uttarakhand, Himachal) and
- eastern (Sikkim, Arunachal).
- As LAC is not fully and officially demarcated, it has led to differing perceptions regarding the alignment, with China making territorial claims in at following areas.
- The countries disagree on the exact location of the LAC in various areas, so much so that India claims that the LAC is 3,488 km long while the Chinese believe it to be around 2,000 km long.
- The two armies try and dominate by patrolling the areas up to their respective perceptions of the LAC, often bringing them into conflict.
Q1) What is the meaning of de facto border?
It is an international or administrative boundary whose existence and legality is not recognized, but which is a practical division between separate national and provincial administering authorities.
Source: The Hindu
Last updated on November, 2025
→ Check out the latest UPSC Syllabus 2026 here.
→ Join Vajiram & Ravi’s Interview Guidance Programme for expert help to crack your final UPSC stage.
→ UPSC Mains Result 2025 is now out.
→ UPSC Notification 2026 is scheduled to be released on January 14, 2026.
→ UPSC Calendar 2026 is released on 15th May, 2025.
→ The UPSC Vacancy 2025 were released 1129, out of which 979 were for UPSC CSE and remaining 150 are for UPSC IFoS.
→ UPSC Prelims 2026 will be conducted on 24th May, 2026 & UPSC Mains 2026 will be conducted on 21st August 2026.
→ The UPSC Selection Process is of 3 stages-Prelims, Mains and Interview.
→ UPSC Result 2024 is released with latest UPSC Marksheet 2024. Check Now!
→ UPSC Prelims Result 2025 is out now for the CSE held on 25 May 2025.
→ UPSC Toppers List 2024 is released now. Shakti Dubey is UPSC AIR 1 2024 Topper.
→ UPSC Prelims Question Paper 2025 and Unofficial Prelims Answer Key 2025 are available now.
→ UPSC Mains Question Paper 2025 is out for Essay, GS 1, 2, 3 & GS 4.
→ UPSC Mains Indian Language Question Paper 2025 is now out.
→ UPSC Mains Optional Question Paper 2025 is now out.
→ Also check Best IAS Coaching in Delhi


