Training A member of the National Guard serving on full-time National Guard duty under orders authorized under paragraph (1) shall participate in the training required under section 502(a) of this title in addition to the duty performed for the purpose authorized under that paragraph. The pay, allowances, and other benefits of the member while participating in the training shall be the same as those to which the member is entitled while performing duty for the purpose of carrying out border control activities. The member is not entitled to additional pay, allowances, or other benefits for participation in training required under section 502(a)(1) of this title. (B) Funding Appropriations available for the Department of Defense for homeland defense may be used for paying costs associated with a member’s participation in training described in subparagraph (A). The appropriation shall be reimbursed in full, out of appropriations available for paying those costs, for the amounts paid. Appropriations available for paying those costs shall be available for making the reimbursements. (C) Restrictions To ensure that the use of units and personnel of the National Guard of a State pursuant to a State border control activities plan does not degrade the training and readiness of such units and personnel, the following requirements shall apply in determining the border control activities that units and personnel of the National Guard of a State may perform: (i) The performance of the activities may not adversely affect the quality of that training or otherwise interfere with the ability of a member or unit of the National Guard to perform the military functions of the member or unit. (ii) National Guard personnel will not degrade their military skills as a result of performing the activities. (iii) The performance of the activities will not result in a significant increase in the cost of training. (iv) In the case of border control activities performed by a unit organized to serve as a unit, the activities will support valid