The qualifications of a _freeman_ were, that he "should be twenty-one years of age, of sober, peaceable conversation, orthodox in religion [which included belief in God and the Holy Scriptures, but did not include any form of Church government], and possess rateable estate to the value of twenty pounds." In 1636--sixteen years after their landing at New Plymouth--the laws which they had enacted were first collected, prefaced by a declaration of their right to enact them, in the absence of a Royal Charter.

Their laws were at various times revised and added to, and finally printed in 1671, under the title of "Their Great Fundamentals." They recognized the general laws of England, and adopted local statutes or regulations according to what they considered their needs.[14] Of their sense of duty as British subjects, and of the uniform mutual relations of friendship existing between them and their Sovereigns, their records and history furnish abundant proofs.

The oath required of their Governors commenced in the following words: "You shall swear to be truly loyal to our Sovereign Lord King Charles, his successors and heirs." "At the Court held," (says the record,) "at Plymouth, the 11th of June, 1664, the following was added, and the Governor took the oath thereunto: 'You shall also attend to what is required by His Majesty's Privy Council of the Governors of the respective colonies in reference unto an Act of Parliament for the encouraging and increasing of shipping and navigation, bearing date from the 1st of December, 1660.'" The oath of a freeman commenced with the same words, as did the oath of the "Assistants" or Executive Councillors, the oath of constables and other officers in the colony.

It was likewise ordered, "That an oath of allegiance to the King and fidelity to the Government and to the several colonies [settlements] therein, be taken of every person that shall live within or under the same." This was as follows: "You shall be truly loyal to our Sovereign Lord the King and his heirs and successors: and whereas you make choice at present to reside within the government of New Plymouth, you shall not do or cause to be done any act or acts, directly or indirectly, by land or water, that shall or may tend to the destruction or overthrow of the whole or any of the several colonies [settlements] within the said government that are or shall be orderly erected or established; but shall, contrariwise, hinder, oppose and discover such intents and purposes as tend thereunto to the Governor for the time being, or some one of the assistants, with all convenient speed.

You shall also submit unto and obey such good and wholesome laws, ordinances and officers as are or shall be established within the several limits thereof.