28 (1) Upon application made without notice by an investigator, a justice of the peace may issue a warrant, if satisfied on information under oath that there are reasonable grounds to believe that, (a) there has been or is likely to be a contravention of this Act or the regulations; and (b) there is, in any place or conveyance anything relating to the contravention of this Act or the regulations. Powers under warrant (2) Subject to any conditions contained in it, a warrant obtained under subsection (1) authorizes an investigator, (a) to enter or access the place or conveyance specified in the warrant and examine and seize anything described in the warrant; (b) to use any data storage, processing or retrieval device or system used in carrying on business in order to produce information or evidence described in the warrant, in any form; (c) to exercise any of the powers specified in subsection (10); and (d) to use any investigative technique or procedure or do anything described in the warrant. Entry of dwelling (3) Despite subsection (2), an investigator shall not exercise the power under a warrant to enter a place or conveyance, or part of a place or conveyance, actually used as a dwelling, unless, (a) the justice of the peace is informed that the warrant is being sought to authorize entry into a dwelling; and (b) the justice of the peace authorizes the entry into the dwelling. Conditions on warrant (4) A warrant obtained under subsection (1) shall contain the conditions that the justice of the peace considers advisable to ensure that any search authorized by the warrant is reasonable in the circumstances. Execution of warrant (5) A warrant issued under this section shall specify the hours and days during which it may be executed. Expiry (6) Unless renewed, a warrant under this section expires not later than 30 days after the date on which it is made. Renewal of warrant (7) A warrant under this section may be renewed for any reason for which it may be issued. Assistance (8) An investigator acting under the authority of a warrant issued under this section is authorized to call on police officers and experts to assist in the execution of the warrant and to use such force as is necessary in the execution of the warrant. No obstruction (9) No person shall obstruct an investigator executing a warrant under this section or withhold from the investigator or conceal, alter or destroy anything relevant to the investigation being conducted pursuant to the warrant. Assistance (10) An investigator may, in the course of executing a warrant, require a person to produce the evidence or information described in the warrant and to provide whatever assistance is reasonably necessary, including using any data storage, processing or retrieval device or system to produce, in any form, the evidence or information described in the warrant and the person shall produce the evidence or information or provide the assistance. Return of seized items (11) Subject to section 33, an investigator who seizes anything under this section or section 29 may make a copy of it and shall return it within a reasonable time or shall dispose of it in accordance with the direction of the Registrar, subject to anything provided for in the regulations. Admissibility (12) A copy of a document or record certified by an investigator as being a true copy of the original is admissible in evidence to the same extent as the original and has the same evidentiary value.