Voinian missions are available at Pax Station ONLY if you HAVE NOT done the "Rescue Voinian Defector" mission. Once you've done that, you can't do the Voinian missions without editting the resource.
Oddly enough, you can do the whole UE/Emalgha/Hinwar objective and start the Voinian missions. You can't finish them though due to the changes in the galaxy after the objective has been finished.
BTW, it takes a fairly high combat rating to get the Voinian missions, at least a competant as I recall.
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One cannot walk down an avenue, converse with a friend, enter a building, browse beneath the sandstone arches of old towns without meeting with an instrument of time.
Time is visible in all places.
Clock towers, wristwatches, church bells divide years into months, months into days, days into hours, hours into seconds, each increment of time marching after the other in perfect succession. And beyond any particular clock, a vast scaffold of time, stretching across the universe, lays down the law of time equally for all.
In this world, a second is a second is a second.
Time moves forward with unwavering regularity.
Time is an infinite ruler.
Time is absolute.