(a) A breath sample shall be collected at the direction and to the satisfaction of a police officer and shall be analyzed with breath analysis instruments meeting the criteria set forth in section 59.4 of this Part.

(b) The subject shall be observed for at least 15 minutes prior to the collection of the breath sample, during which period the subject must not have ingested alcoholic beverages or other fluids, regurgitated, vomited, eaten, or smoked, or have placed anything in his/her mouth; if the subject should regurgitate, vomit, smoke or place anything in his/her mouth, an additional 15-minute waiting period shall be required.

(c) A system purge shall precede both the testing of each subject and the analysis of the reference standard.

(d) The result of an analysis of a reference standard with an alcoholic content greater than or equal to 0.08 percent must agree with the reference standard value within the limits of plus or minus 0.01 percent weight per volume, or such limits as set by the commissioner. An analysis of the reference standard shall precede or follow the analysis of the breath of the subject in accordance with the test sequence established by the training agency. Readings for the reference standard, a blank and the subject's breath, shall be recorded.

(e) Results of an analysis of breath for alcohol shall be expressed in terms of percent weight per volume, to the second decimal place as found; for example, 0.237 percent found shall be reported as 0.23 percent.