 Of course, whenever colonial goods passed through English ports, they were taxed.In addition, certain colonial goods such as tobacco, rice, and sugar could be shipped only to England — not even to other British colonies unless they paid a tax first.To encourage settlement, the Charter of Carolina had exempted Carolinians from paying export duties, or taxes, on goods such as tobacco — but only for seven years, and in 1670, that exemption expired, and the Navigation Acts went into full force.