This was when the English enforced four different laws to make sure the trade balance was proper.
The four different laws
Only English or English colonial ships could carry cargo between imperial ports.
Certain goods, including tobacco, rice, and furs, could not be shipped to foreign nations except through England or Scotland.
The English Parliament would pay “bounties” to Americans who produced certain raw goods, while raising protectionist tariffs on the same goods produced in other nations.
Americans could not compete with English manufacturers in large-scale manufacturing.