(1) A charge or specification must not be referred to a general court-martial for trial until a thorough and impartial investigation of all matters set forth in the charge or specification has been made. The conduct of this investigation is the responsibility of the officer exercising special court-martial jurisdiction over the accused and must include inquiry as to the truth of the matter set forth in the charges, consideration of the form of charges, and a recommendation as to the disposition that should be made of the case in the interest of justice and discipline. The investigating officer shall submit a formal report to the convening authority, the state staff judge advocate, and the accused. This report must include all of the following:

    (a) A statement of the name, organization, or address of counsel and information as to the presence or absence of counsel throughout the proceedings if counsel has been requested by the accused.

    (b) A summarized statement of all relevant testimony including the names and units, if applicable, of the individuals giving testimony.

    (c) A statement indicating all sources of information considered by that officer in reaching conclusions or making recommendations.

    (d) A statement of the names and units of all witnesses essential to the defense or prosecution of the case.

    (2) Before an investigation initiated under this code, the accused must be informed of the accused's rights under section 31, including the right to counsel, in the manner provided in that section, and, in addition, must be informed of all of the following:

    (a) The offense of which the accused is suspected, accused, or charged.

    (b) The name of the accuser and the witnesses against the accused that are known by the investigating officer.

    (c) The fact that charges are about to be investigated.

    (d) The accused's right to cross-examine witnesses and to present anything by way of statement or otherwise the accused may desire in the accused's own behalf, either in defense, extenuation, or mitigation.

    (3) At an investigation, full opportunity must be given to the accused to cross-examine witnesses if the witnesses are available, and to present anything the accused may desire in the accused's own behalf, either in defense or mitigation, and the investigation officer shall examine available witnesses requested by the accused.

    (4) If an investigation of the subject matter of an offense has been conducted before the accused is charged with the offense, and if the accused was present at the investigation and afforded the opportunities for representation, cross-examination, and presentation prescribed in subsections (2) and (3), further investigation of that charge is not necessary under this section unless it is demanded by the accused after the accused is informed of the charge. A demand for further investigation entitles the accused to recall witnesses for further cross-examination and to offer new evidence in the accused's own behalf.