According to the Catholic Church, in Luke 10:19 what kind of authority & power Jesus had given the Apostles & Disciples? What I'm looking for: 

Scriptures said 


  'See, I have given you authority to tread on snakes and scorpions, and
  over all the power of the enemy. Nothing will harm you. Nevertheless,
  do not rejoice that the spirits submit to you... (Luke 10:19)


Is the Authority &amp; Power only given during Jesus time or can any Christian believers can possess it even during our times? 

Is the Authority only given to Church Authority, or to elders in the community?

I will limit the desired answer to be based upon Roman Catholic Church teaching and any biblical basis it provides.
The Catholic Haydock Commentary says on Lk. 10:19:


  Ver. 19. Given you power, &amp;c. By these words our Saviour seems to insinuate, that the venom of serpents, and the other noxious qualities of some animals, proceed from the malice of the devil. These are the arms and the instruments he makes use of to kill us, being the prince of death and a murderer from the beginning, as the Scripture styles him. The Jews attributed sickness, poisons, and every thing of the same kind to evil spirits.


cf. also what St. Thomas Aquinas collected, in his Catena Aurea, from the Fathers on this verse