"The actual form of the 1983 change was somewhat complex. It provided:
1) That the Social Security and Medicare trust funds (and the income and outgo to these funds) be treated as separate budget functions, starting with the 1985 fiscal year and ending with fiscal year 1992.
...
3) Starting with fiscal year 1993, Social Security and the Medicare Part A trust funds were not only off-budget, but were exempted from any general budget reductions that might otherwise apply to the entire federal budget (such as an across-the-board cut). The Part B Medicare trust fund, while also to be shown as a separate budget function, was not protected from general budget limitations.
Thus, in this rather complicated fashion, the Social Security program was again off-budget by FY 1985. Perhaps the more important date here, however, was the 1993 date because that date exempted the Social Security program from the potential of generalized budget-cuts."