relevant to the investigation, require a person present on the premises to provide the employee with any facilities, information, documents or records, or other assistance that the employee may reasonably request. An authorised employee exercising the power of entry shall, if so required, produce evidence of the employee’s authorisation for the purpose of this section before entering the premises, or at any time before leaving the premises. If an authorised employee exercises the power to take samples the employee shall: leave a notice at the premises with a responsible person (or, if that is impracticable, fixed in a prominent position) giving particulars of the article or substance and stating that the employee has taken a sample of it, and if it is practicable to do so, give such a person at the premises a portion of the sample marked in a manner sufficient to identify it. If an authorised employee exercises the power to take possession of an article or substance the employee shall leave a notice at the premises (either with a responsible person or if that is impracticable fixed in a prominent position) giving particulars of the article or substance and stating that the employee has taken possession of it. This section applies in relation to vehicles as it applies in relation to premises, and: gives the power to enter premises in which a vehicle in which there has been a fire is being kept, gives the power to take persons and equipment to the place where a vehicle is, and references to premises include references to premises in which vehicles are kept. In this section “premises” includes land. Northern Ireland Any person who assaults, resists, obstructs or impedes a fire and rescue officer in the execution of his duty, or a person assisting a fire and rescue officer in the execution of his duty, commits an offence. The maximum punishment is: on summary conviction, to imprisonment for a term not exceeding 6 months and/or a fine not exceeding the statutory maximum, or on conviction on indictment, to imprisonment for a term not exceeding 2 years and/or a fine. If a person falsely pretends to be a fire and rescue officer or an authorised officer he shall be guilty of an offence and shall be liable on summary conviction to a fine not exceeding level 3 on the standard scale. In emergencies An on-duty fire officer may do