342 APPENDIX 2 



incurred during periods of travel or, at the Contractor's option, an allow- 

 ance, in lieu of actual subsistence expenses of such persons, not exceeding 

 (i) six dollars ($6.00) per person for each calendar day or major fraction 

 thereof during the period of travel within the continental limits of the 

 United States, and (ii) seven dollars ($7.00) per person for each calendar 

 day or major fraction thereof during the period of foreign travel outside 

 the continental limits of the United States; Provided, That all such 

 foreign travel shall be limited to persons directly engaged in the per- 

 formance of the subject work hereunder and shall be authorized or ap- 

 proved in writing by the Contracting Officer; Provided, further, That 

 expenses for transportation hereunder by motor vehicle other than com- 

 mon carrier or rented automobile shall be reimbursed on a reasonable 

 actual expense basis or, at the Contractor's option, on a mileage basis at a 

 rate not exceeding five cents (5^) per mile per vehicle, in lieu of the 

 actual expenses of such transportation; 



(7) Insurance. Expenditures by the Contractor hereunder for premiums on 

 (i) insurance required by law, and (ii) insurance required or specifically 

 approved by the Contracting Officer; 



(8) Subcontracts. Expenditures by the Contractor representing payments to 

 subcontractors performing any research or development hereunder; 



(9) Real Property. Expenditures by the Contractor hereunder for leasing, 

 purchasing, or otherwise acquiring real property or altering or construct- 

 ing buildings; 



(10) Termination. Expenditures by the Contractor in connection with an ac- 

 celeration of termination of the subject work; 



(11) Special Costs. Special expenditures by the Contractor which are specifically 

 certified by the Contracting Officer in writing to constitute part of the 

 "actual cost" of its undertakings hereunder. 



(e) Advance Payments. If the Contractor requests in writing that an advance 

 payment be made on account of reimbursable "actual cost," the Government shall 

 advance the amount estimated by the Contractor and concurred in by the Con- 

 tracting Officer as the probable "actual cost" during any calendar month for 

 which no payment has previously been made; Provided, That the Contracting 

 Officer may in his discretion withhold approval of any such advance payment to 

 protect the interests of the Government; Provided, further, That in case of such 

 advance payment, the Contractor shall submit vouchers for its "actual cost" during 

 the month for which such advance is made and an accounting for the full amount 

 of such advance before the end of the following month, and shall return to the 

 Government, when and if requested by the Contracting Officer, the portion of 

 such advance for which vouchers have not been so submitted, without prejudice 

 to the right of the Contractor to obtain reimbursement payments for "actual cost" 

 upon the later submission of vouchers. 



ARTICLE 3. (a) Disposition of Personal Property. At any time prior or subse- 

 quent to the termination of the subject work, the Contractor shall deliver at the 

 Government's expense, when and as directed by the Contracdng Officer, all or any 

 part of materials, supplies, apparatus, equipment or other articles of personal 



