Before any certificate of convenience and necessity may issue[,] a certified copy of its articles of incorporation, or charter, if the applicant be a corporation, shall be filed in the office of the commission. The commission shall have power, after hearing involving the financial ability and good faith of the applicant and necessity of additional service in the community to issue said certificate as prayed for, or to refuse to issue the same, or to issue it for the construction of any portion only of the contemplated street railroad, line, plant or system or extension thereof, or for the partial exercise only of said right or privilege, and may attach to the exercise of the rights granted by said certificate, such terms and conditions as in its judgment the public convenience and necessity may require.