2.1.1. User shall not perform any actions that may result in:

a) impairing the operation of RU-CENTER's equipment and network;
b) impairing RU-CENTER's provision of Services or the use of Services by any other Internet user;
c) unauthorized access to RU-CENTER's computing and network resources;
d) damage or the possibility of damage to any other User or any third party;
e) misrepresenting RU-CENTER to any third party as the source of any information (sender of any message, program, or enquiry) that RU-CENTER is not the source of.

2.1.2. User may not place information or software prohibited by the applicable RF legislation and/or violating third persons' rights.>

2.1.3. User shall comply with the Special Terms of Use set forth in Section 3 herein.

2.1.4. The restrictions and requirements under Subsections 2.1.1, 2.1.2 and 2.1.3. may be changed by RU-CENTER at any time, without any notice to User.

2.3.1. RU-CENTER is entitled to apply the following sanctions to Users that violate the provisions of Subsection 2.1:

a) suspend or refuse the provision of any or all Services at its own discretion;
b) take steps to stop User from violating the Terms of Use.

2.3.2. RU-CENTER sanctions will be applied without prior warning or notice to User and may be short- or long-term in nature.

2.3.3. The actions specified in Subsections 2.3.1 may concern single IP addresses, groups of IP addresses, subnetworks, domains, and e-mail addresses, and may be applicable to User that performed the action, to User's network, and to any network or system through which the action was effected.

2.3.4. Upon repeated violation of the Terms of Use set forth herein, RU-CENTER reserves the right to terminate the provision of Services to User.

2.3.5. RU-CENTER shall minimize the adverse effects of applied sanctions on User and any other third party.

3.1.1. RU-CENTER reserves the right not to accept and process User e-mail messages in the following cases:

a) the message contains advertising or other information that has not been requested by RU-CENTER and is not relevant to RU-CENTER Services;
b) the message has an invalid or inactive outgoing or incoming address;
c) the address indicated in the message as the sender's address does not belong to the sender;
d) the message is sent by a dialup-User through a mail server other than any of the mail servers of User's ISP;
e) the size of the message exceeds 4 Mbytes;
f) the message is sent in a format that allows for the transmission of executable applications, in particular computer viruses;
g) the message is a repeated message.

3.1.2. RU-CENTER reserves the right to stop accepting e-mail messages sent from User's addresses if User violates Section 2 herein.

3.1.3. If the restrictions specified in Subsections 3.1.1-3.1.2 are applied, User is not sent any notification and User's e-mail messages are not returned.

3.1.4. If RU-CENTER has ceased accepting and processing User's e-mail messages as a result of violating Section 2 herein, in order to resume the use of these Services, User has to send a message with the following information to mail-trouble-reports@nic.ru:

a) a request to restore the access;
b) the response of RU-CENTER's mail system with the refusal to accept a message;
c) the address from which the acceptance of messages has been stopped;
d) the steps taken by User to remedy the violation.

3.1.5. If RU-CENTER has ceased accepting and processing User's e-mail messages in a case provided for in Subsection 3.1.1 herein, User has to apply to RU-CENTER administrative group that manages User's contract with RU-CENTER, or send a message with the following information to mail-trouble-reports@nic.ru:

a) a request to restore the access;
b) the response of RU-CENTER's mail system with the refusal to accept a message;
c) the address from which the acceptance of messages has been stopped.

3.2.1. Limitations on Use of Data

3.2.2. Technical restrictions on Use of RU-CENTER's Whois Service