Reference for hazard level multipliers

[rajdeepsaharia]

In the target displacement module when Eurocode 8 part 3 is selected, and under seismic action tab in the other spectral shape when IS 1893: Part 1:2016 Indian Code is selected , a window appears for hazard level multiplier.
The default DL, SD, NC values are 0.78, 1 and 1.734 respectively. I have understood the significance of these values, but please let me know why only these specific values are taken, and what are the references for these values.

[z.gronti]

Dear rajdeepsaharia,

The default values of the Hazard Levels are according to the Codes. You may find the corresponding paragraph for Eurocodes in Section 2.1(4) of Eurocode 8-Part 1.

[rajdeepsaharia]

Thank you for taking the trouble to answer my question.It was of great help.
-My sincere appreciation.