He said this has been common practice in the past "everywhere in Europe".
For decades it has been common practice to use circulation pumps in household central heating systems.
For decades, it has been common practice for lawmakers to designate money for specific military bases, post offices and waterways.
Although there is no legal requirement that candidates release their tax returns, it has been common practice since the '70s.
It has been common practice for both parties to raise funds using access to leaders as bait.
In Sweden and Finland this has been common practice for single-family timber houses since the 1970s.
The outsourcing of individual council services to large private corporate companies such as Capita, Serco and BT has been common practice across local government for four decades.
Since 1925, it has been common practice for nominees to be vetted by the judiciary committee before receiving a hearing before the full Senate.
Although paying to skip queues has been common practice at British theme parks for some years, Sandel has argued that some things should perhaps be considered sacrosanct.
Known as the "Bachkonzept" or the "stream concept", urban river restoration has been common practice in Switzerland's largest city for 30 years.
2016 U.S. Electoral College map: Visualizing a U.S. presidential election by coloring each state blue or red has been common practice since 1976.
