How Data Locks Are Respected?

Here are the rules on how data locks are respected:
All statements ignore data locks owned its own transaction.
SELECT query statements ignores data locks owned by any transactions.
INSERT, UPDATE, and DELETE statements in a READ COMMITTED transaction will wait for
data locks on their targeted rows by other transactions to be released.
INSERT, UPDATE, and DELETE statements in a SERIALIZABLE transaction will fail if their
targeted rows has data locks owned by other transactions.