This document summarizes a research paper that compares the seismic analysis of reinforced concrete shaft-supported water storage tanks according to two Indian codes: IS 1893-1984 and IS 1893-2002 (Part 2). The analysis was conducted for tanks of 500, 750, and 1000 cubic meters in different seismic zones and soil types. Parameters like base shear, base moment, and time history analysis results were compared between one-mass and two-mass tank models. The 2002 code produced higher base shear values, indicating existing tanks may be deficient. Empty tanks had higher base moments than full tanks. Two-mass models provided a more realistic representation of tank response than one-mass models.