The 2013 edition of Social Security Explained succinctly provides a succint, comprehensive, and detailed explanation of the federal old-age, survivor's and disability insurance programs under the Social Security Act. The book explains who is covered by the Social Security system, liability for the tax, how a worker acquires "insured status" required for benefit eligibility and the conditions of entitlement to the various kinds of Social Security benefits. Throughout the text, statements are documented by citations to the law, regulations and administrative rulings.