Each employee shall have the right to form, join, or assist any labor organization, or to refrain from any such activity, freely and without fear of penalty or reprisal, and each employee shall be protected in the exercise of such right. Except as otherwise provided under this chapter, such right includes the right—

(1) to act for a labor organization in the capacity of a representative and the right, in that capacity, to present the views of the labor organization to heads of agencies and other officials of the executive branch of the Government, the Congress, or other appropriate authorities, and

(2) to engage in collective bargaining with respect to conditions of employment through representatives chosen by employees under this chapter.