The TEU and the TFEU (Treaty of Lisbon) are the primary sources of EU law
Protocols and Declarations under the Treaties carry Treaty status
REGULATIONS
Art 288: '[Regulations have] general application...binding in its entirety and directly applicable in all Member States.'
DIRECTIVES
Art 288: '[Directives are] binding as to the result to be achieved, upon each Member State to which it is addressed.' but national authorities have discretion over the 'form and methods' to achieve the goal of the Directive