Age of majority; revise.

HB 536 lowers Mississippi's age of legal adulthood from 21 to 18 across multiple state laws. It directly affects all Mississippi residents turning 18 by changing their legal status in areas like contract signing (allowing 18-year-olds to enter binding agreements), jury service, marriage licensing, adoption proceedings, and guardianship. Key provisions include revising the definition of "infant" to include those under 18 (Section 1-3-21), updating marriage license age requirements (Section 93-1-5), and aligning adoption and guardianship laws with the new age (Sections 93-17-5, 93-20-102). The bill also repeals two older exceptions that previously allowed certain veterans or executors to retain minority status beyond age 21.