Usually you need to be BLS certified for your med 3 year.
Residency programs generally do ACLS certification during orientation. As a med student, you can't order the ACLS drugs during a code anyhow. Other certifications (PALS, ATLS, etc.) are also done in orientation or at some key point in residency.
Some med schools will get their med students ACLS certified as well (mine offered it to med4s after the match), but that is variable. Most do not, AFAIK.