The upper age limit for admission to a BBA LLB course varies with the university and country. In India, the Bar Council of India (BCI) earlier had a rule that there should be an upper age limit of 20 years for general category students and 22 years for reserved category students for 5-year integrated law courses. This provision has been challenged in courts, and many universities do not follow it rigidly. Private universities, especially, do not usually have any age limit, so students of any age can apply.
Other universities overseas also use relaxed age parameters for BBA LLB courses, so that students who took a gap during their studies could apply. Check with the individual university requirements in advance of submitting an application. If age becomes an issue, other legal educational routes, for example, 3-year LLB after completing graduation, are an option.