The citation is ambiguous. It may mean:
53 Stat. 1149 (Pub. Law 76-253)
AN ACT To provide for the regulation of the sale of certain securities in interstate and foreign commerce and through the mails, and the regulation of the trust indentures under which the same are issued, and for other purposes
You can view this U.S. Statutes at Large citation at these source(s):
53 Stat. 1149
U.S. Statutes at Large
PDF - https://govtrackus.s3.amazonaws.com/legislink/pdf/stat/53/STATUTE-53-Pg1149.pdf
also:
We also found 1 parallel citation:
53 Stat. 1147 (Pub. Law 76-252)
AN ACT To prevent pernicious political activities
Link is to an internal page within a statute beginning on page 1147.
You can view this U.S. Statutes at Large citation at these source(s):
53 Stat. 1147
U.S. Statutes at Large
PDF - https://govtrackus.s3.amazonaws.com/legislink/pdf/stat/53/STATUTE-53-Pg1147.pdf
also:
We also found 1 parallel citation: