a written notice and indicates the reasons for the agencies, organizations or individuals to know. 4. When posting or broadcasting the feedback information, the press agency must express all contents as follows: a) Name of agencies, organizations or individuals giving information feeback; b) Name of journalistic work, name of column, newspaper number, date of posting or  broadcasting with information feedback. Article 44. Advertising in press The press may post or broadcast the advertising. The posting or broadcasting of advertisement must comply with the provisions of this Law and the regulations of law on  advertising. Article 45. Copyright in the field of press The press agency must comply with the regulations of law on the copyright and relevant  law upon posting or broadcasting of journalistic works. Article 46. Information to be specified or indicated in press The press agency must specify or indicate all of the following information: 1. On the first page, cover one of printed newspaper, the home page and the pages of online newspaper, there must be the following contents: a) Name of journalistic product; b) Name of press agency, name of press line agency (to be written under the name of newspaper); domain name of online newspaper; c) Ordinal number of press release of printed newspaper; d) Date of press release. 2. At the foot of the last page and last cover of printed newspaper, the home page of online newspaper, there must be the following contents: a) Permit number, date of issue and agency issuing the press operation permit; b) Address of the press agency, telephone number, fax, email and full name of the head of the press agency; c) Place of printing, size, number of pages, publishing period and selling price of the printed newspaper.  3. The talking newspaper and photo newspaper must express the symbol and theme song. Article 47. Protecting the contents of broadcasting programs and television programs and the contents of online newspaper