53 STAT.] 76TH CONG., IST SESS.-CH. 367-JULY 26, 1939 by the assessor or where the payment of the tax is lawfully suspended under the regulations for the administration of this title, interest shall be paid at the rate of 6 per centum per annum from the date on which the tax would otherwise be payable. "SEC. 5. If any person shall fail to perform any duty imposed upon him by the provisions of this title or the regulations made hereunder the Commissioners may proceed by petition for mandamus to compel performance and upon the granting of such writ the court shall adjudge all costs of such proceeding against the delinquent. "SEC. 6. Any person required by this title to file a return who fails to file such return within the time prescribed by this title, or within such additional time as may be granted under regulations promul- gated by the Commissioners, shall become liable in his own person and estate to the District in an amount equal to 10 per centum of the tax found to be due. In case any person required by this title to file a return knowingly files a false or fraudulent return, he shall become liable in his own person and estate to the said District in an amount equal to 50 per centum of the tax found to be due. Such amounts shall be collected in the same manner as is herein provided for the collection of the taxes levied under this title. "SEC. 7. Any person required by this title to pay a tax or required by law or regulation made under authority thereof to make a return or keep any records or supply any information for the purposes of computation, assessment, or collection of any tax imposed by this title, who willfully fails to pay such tax, make any such return, or supply any such information at the time or times required by law or regulation shall, in addition to other penalties provided by law, be guilty of a misdemeanor and upon conviction thereof be fined not more than $1,000 or imprisoned for not more than one year, or both. "SEC. 8. When the assessor is satisfied that the tax liability imposed by this title has been fully discharged or provided for, he may, under regulations prescribed by the Commissioners2 issue his certificate, releasing any or all property from the lien herein imposed. "SE. 9. No person holding, within the District, tangible or intan- gible assets of any resident or nonresident decedent, of the value of 300 or more, shall deliver or transfer the same or any part thereof to any person other than an executor, administrator, or collector of the estate of such decedent appointed by the District Court of the United States for the District of Columbia, unless notice of the date and place of such intended transfer be served upon the assessor of the District of Columbia at least ten days prior to such delivery or trans- fer, nor shall any person holding, within the District of Columbia, any assets of a resident or nonresident decedent, of the value of $300 or more, deliver or transfer the same or any part thereof to any per- son other than an executor, administrator, or collector of the estate of such decedent appointed by said District Court without retaining a sufficient portion or amount thereof to pay any tax which may be assessed on account of the transfer of such assets under the provisions of articles I and II without an order from the assessor of the District of Columbia authorizing such transfer. It shall be lawful for the assessor of the District, personally, or by his representatives, to examine said assets at any time before such delivery or transfer. Failure to serve such notice or to allow such examination or to retain as herein required a sufficient portion or amount to pay the taxes imposed by this title shall render such person liable to the payment of such taxes. The assessor of the District may issue a certificate authorizing the transfer of any such assets whenever it appears to the satisfaction of said assessor that no tax is due thereon: Provided, however, That any corporation, foreign or domestic to the District having outstanding stock or other securities registered in the sole 1117 Enforcement pro- ceedings. Personal liability for failure to file return, etc. False or fraudulent return. Additional penal- ties. Certificate of dis- charge. Delivery of property of decedent, restric- tion. Retention of portion to pay tax. Examination al- lowed. Penalty provisions. Issuance of certifi- cate of transfer. Proesoa. Transfer of stocks or other securities.