"and as the fourth and most advanced reactor of the chernobyl plant approached
completion, a time-consuming safety test on the unit turbines remained outstanding.
brukhanov quietly postponed it, and so met moscow’s deadline for completion on
the last day of december 1983."
this is an excerpt from by adam higginbotham.

Midnight in Chernobyl

Explanation:

The book is a recolection of testimonies and declassified documents that recount the events which led to Chernobyl's nuclear disaster in April 26, 1986. The infamous disaster is now considered a cautonary tale about the mismanagement of nuclear power, serving as well as the backdrop illustrating the Soviet Union's compulsion for secrecy and  decadance when the disaster took place.

the enslaved people onboard suffered from illness with some frequency

the answer is a) the proclamation of 1763.