General provisions in the usage of tickets for visiting Ha Long bay

Organizations and individuals related to the usage of tickets for visiting Ha Long bay must not violate one of these following provisions:
1) Erase, change the content of tickets.
2)   Use fake tickets.
3) Fail to comply with provisions on tickets when using them
4) Use expired tickets.
5) Misinform to be entitled the exemption or price reduction of tickets.
6) Execute against legal regulations on printing, distributing, managing and using prints.