be given within 30 days after the injury or death;
be given to the immediate superior of the employee by personal delivery or by depositing it in the mail properly stamped and addressed;
be in writing;
state the name and address of the employee;
state the year, month, day, and hour when and the particular locality where the injury or death occurred;
state the cause and nature of the injury, or, in the case of death, the employment factors believed to be the cause; and
be signed by and contain the address of the individual giving the notice.
(Pub. L. 89–554, Sept. 6, 1966, 80 Stat. 543; Pub. L. 93–416, § 12(a), Sept. 7, 1974, 88 Stat. 1146.)