The only thing the US Constitution says about this is;
"He shall from time to time give to Congress information of the State of the Union and recommend to their Consideration such measures as he shall judge necessary and expedient."
(Article II, Section 3)
The custom has developed that the President gives his State of the Union Address to Congress every year in January.
The Congress' main duty is to make and pass laws.
to make laws and pass it to the president
one duty is to report to congress once a year
There are not any duties of the President that are shared by the Vice President and the President can not perform any of the Vice President's two duties.
Money, personal gain, civil duty and the President
In a contract, the duty to perform is triggered when both parties agree to the terms and conditions outlined in the contract.
LBJ was a Lieutenant Commander in the US Navy Reserve and served briefly on active duty before being recalled by the President to return to Congress.
The legislative branch (or Congress) is divided into two parts called the House of Representatives and the Senate. These two bodies must both approve any laws before Congress passes them. Congress also has the power to impeach the president if it so chooses.
The main duty of congress is to pass laws
The Congress' main duty is to make and pass laws.
Roger Sherman believed the President should be appointed by the legislature, because he saw the Presidency as an office whose sole duty was to carry out what Congress decreed. He felt that the President should not be accountable to anyone but Congress since he would be in effect Congress's agent and Congress has the supreme power of government.
I suppose that would be dereliction of duty and malfeasance in office.