Constitutional law deals with the assignment or restriction of the powers and branches of a government. If you are asking whether something is constitutional, it's helpful if you provide reasons as to why you think it is or isn't constitutional. Note: this tag is not country specific - please add a country tag to your question as well.
Constitutional law governs the assignment and restriction of the powers of government.
A constitution will typically establish the branches of a government - the executive, judiciary, and legislature.
Beyond this, it may also state the means by which the constitution itself may be amended, and the means by which the government may legislate.