An offhand comment on a conference call regarding the Employee Frre Choice Act (ERCA, H.R. 1409), that very small businesses have been exempted from jurisdiction from the National Labor Relations Board (NLRB) since 1959, got me to digging. And what I initially found was of interest:
That while there is nothing in the National Labor Relations Act (NLRA) that sets a floor as to when a business falls under the jurisdiction of the NLRB, it has been the NLRB's practice since the 1950's to exempt very small businesses, and this was codified in 1959. In general, the when a business has a cash volume of $500,000 for retail, and $50,000 for everything else, AND does commerce that crosses state lines, the NLRB hcase jurisdiction.