The phrase "asserted principle" is correct and usable in written English.
It can be used when referring to a principle that has been stated or claimed, often in a formal or academic context.
Example: "The researcher presented an asserted principle that challenges traditional views on the subject."
Alternatives: "stated principle" or "claimed principle".
The Republican unwillingness to raise taxes even to increase resources for the military, or to balance the budget (two other asserted principles of the Party), shows that cutting taxes is really their pre-eminent principle.
But we will not stop asserting principles that are consistent with our ideals, whether that means opposing the use of violence as a means of suppressing dissent, or supporting the principles embodied in the Universal Declaration of Human Rights.
President Obama firmly asserted that principle on the campaign trail in 2008.
After all, Truman, with full support from the Joint Chiefs of Staff, had simply asserted the principle of civilian control over the military.
Sit-ins at lunch counters asserted a principle of equality against business owners' traditional legal right to decide whom to admit to their places.
The bill asserted the principle of the minimum wage in the fullest and clearest possible terms, subject to the provision of adequate safeguards against abuse.
In the Rayonist manifesto of 1913, he asserted the principle of the reduction of form in figure and landscape compositions into rays of reflected light.
He asserted the principle that war costs more than its direct expenses, for it also costs what its casualties (military and civilian) would have earned throughout their lifetimes if they had never participated in war.
These rights were asserted in principle under Section 7(a) of the National Industrial Recovery Act (NIRA) of 1933 and then made thoroughly effective by passage of the National Labor Relations Act in 1935.
This was followed in 1736 by edicts for the establishment of schools in certain provinces, in 1763 by Frederick II the Great's regulation asserting the principle of compulsory school attendance, and in 1794 by a codification of Prussian law recognizing the principle of state supremacy in education.
