(c) introduces or causes to be introduced any computer contaminant or computer virus into any computer, computer system or computer network; (d) damages or causes to be damaged willingly in any computer, computer system or computer network, data, computer database or any other programmes residing in such computer, computer system or computer network; (e) disrupts or causes disruption of any computer, computer system or computer network; (f) denies of causes the denial of access to any person authorized to access any computer, computer system or computer network by any means; (g) provides any assistance to any person to facilitate access to a computer, computer system or computer network, in contravention of the provisions of this Act, rules or regulations made thereunder; (h) for the purpose of advertisement of goods and services, generates or causes generation of spams or sends unwanted electronic mails without any permission of the originator or subscriber; (i) charges the services availed of by a person to the account of another person by tampering with or manipulating any computer, computer system or computer network; then the above said activities shall be treated as offences of the said person. (2) If any person commits offence under sub-section (1) of this section, he shall be punishable with imprisonment for a term which may extend to ten years, or with fine which may extend to Taka ten lakhs, or with both. Explanation.--For the purpose of this section-(i) "computer contaminant" means any set of computer instructions that are designed-(a) to modify, destroy record, transmit data or program residing within a computer, computer system or computer network; or (b) by any means to usurp the normal operation of the computer, computer system or computer network; (ii) "computer database" means a representation information, knowledge, facts, concepts or instructions in the form of text, image, audio or video that-(a) are being prepared or have been prepared in a formalized manner by a computer, computer system or computer network; and (b) are intended for use in a computer, computer system or computer network; (iii) "computer virus" means such computer instruction, information, data or program, that-(a) destroys, damages, degrades or adversely affects the performance of a computer resource; or (b) attaches itself to another computer resource and operates when a program, data or instruction is executed or some other event takes place in that computer; (iv) "damage" means to destroy, alter, delete, add, modify or rearrange any computer resource by any means. 55. Punishment for tampering with computer source code.--(1) Whoever intentionally or knowingly conceals, destroys or alters or intentionally or knowingly causes other person to conceal, destroy or alter any computer source code used for a computer, computer program, computer system or computer network, when the computer source code is required to be kept or maintained by any law for time being in force, then this activity of his will be regarded as offence. (2) Whoever commits offence under sub-section (1) of this section he shall be punishable with imprisonment for a term which may extend to three years, or with fine which may extend to Taka three lakhs, or with both. 15