Step 1: Understanding the Concept:
Universal Adult Suffrage is a pillar of Indian democracy, and the minimum age for voting is defined in the Constitution.
Step 2: Detailed Explanation:
The 61st Constitutional Amendment Act, 1988, amended Article 326. It reduced the minimum voting age for elections to the Lok Sabha and State Legislative Assemblies from 21 to 18 years.
This change came into force on March 28, 1989.
Step 3: Final Answer:
The 61st Amendment lowered the voting age to 18.