Praetorian Edict of 2348

The Praetorian Edict of 2348 (known as the Expansion Directive outside the Star Empire) was a Romulan Star Empire directive to improve the Star Empire's exploration capabilities. 

As part of the edict Exploration Command upgraded its fleet of heavy scouts.

A side effect of this was that the Romulans refined their ideas for the quantum singularity drive.