The Secretary may, without regard to the application to this chapter of so much of the provisions of
section 3471 of this title as prohibit the enrollment of an eligible veteran in a program of education in which the veteran is “already qualified”, and pursuant to such regulations as the Secretary shall prescribe, approve the enrollment of such individual in refresher courses (including courses which will permit such individual to update knowledge and skills or be instructed in the technological advances which have occurred in the individual’s field of employment during and since the period of such veteran’s active military service), deficiency courses, or other preparatory or special education or training courses necessary to enable the individual to pursue an approved program of education.