You didin't metion which law programme you want to appear for 5 years law Or 3 years law programme. If you are going to appear CLAT, AILET, BLAT entrance exams for 5 yeras Integrated programme then there is no any age limit to apply. And If you want to apply for 3 years law programme and planning the Universities like Delhi University, BHU LLB there is also no any age limit.

Please explain for which programme you want to apply then I can help you more.