Son muy pocas las referencias que pude encontrar hasta el momento, pero todas hablan de un sistema que otorga honores, medallas, méritos.

http://www.thefreedictionary.com/premial
Pre´mi`al
a. 1. Serving to reward; rewarding.

http://dictionary.reference.com/browse/laudative
laudatory or laudative
adjective
1.
containing or expressing praise


http://ifc.dpz.es/recursos/publicaciones/30/55/10garciamerca...
*...nuevos códigos criminales de principios del siglo XIX, la articulación conceptual y sistemática de lo que podríamos llamar un Derecho Premial o de Recompensas –que trate de equilibrar mediante estímulos honoríficos los efectos represores y vindicativos del Derecho Penal– no ha sido nunca conducida a buen puerto en ningún país.*

https://www.ucv.es/jovellanos/documentos/DT_Jovellanos_12.pd...
*...the essence of what was to become Premial —also Praemial, or Laudative— Law, (and, from the economic point of view, the art of public incentives): the awarding of honours —including orders, decorations and medals— as a form of publicly recognising a merit through exteriorisation, thus acting both as a reward and simultaneously as a stimulus and incentive for future excellence and virtuosity...*

http://www.sciencedirect.com/science/article/pii/S2212567112...
*This paper studies the Spanish Premial Law applying an economic viewpoint.*

Sobre *Heráldica y Genealogía*:
https://books.google.com.ar/books?id=jf4NMjp_90MC&pg=PA88&lp...
Pág. 88

Sobre Rusia:
http://the.heraldry.ru/text/rpcorders.html
*The ecclesiastical merits were still considered not loyal enough to fit into the State premial system...*

HTH!