Hot Cargo clause

A clause prohibiting an employer from conducting business with some other person with whom the union has or may have a dispute. Such clauses are illegal [[wex:unfair_labor_practices_ulps|unfair labor practices]] under [[USC:29:151|NLRA]] Section 8(e).  A union will violate the prohibition in section 8(b)(4)(A) against coercing an employer to "cease doing business with any other person" if it uses strikes or any other pressure to force an employer to accept this type of clause.

There are key exceptions to the general rule against such clauses that apply to the construction and garment industries respectively.