5401. (a) Within one working day of receiving notice or knowledge of injury under Section 5400 or 5402, which injury results in lost time beyond the employee's work shift at the time of injury or which results in medical treatment beyond first aid, the employer shall provide, personally or by first-class mail, a claim form and a notice of potential eligibility for benefits under this division to the injured employee, or in the case of death, to his or her dependents.
As used in this subdivision, "first aid" means any one-time treatment, and any follow-up visit for the purpose of observation of minor scratches, cuts, burns, splinters, or other minor industrial injury, which do not ordinarily require medical care. This one-time treatment, and follow-up visit for the purpose of observation, is considered first aid even though provided by a physician or registered professional personnel."Minor industrial injury" shall not include serious exposure to a hazardous substance as defined in subdivision(i) of Section 6302. The claim form shall request the injured employee's name and address, social security number, the time and address where the injury occurred, and the nature of and part of the body affected by the injury. Claim forms shall be available at district offices of the Employment Development Department and the division. Claim forms may be made available to the employee from any other source.
5402. (a) Knowledge of an injury, obtained from any source, on the part of an employer, his or her managing agent, superintendent, foreman, or other person in authority, or knowledge of the assertion of a claim of injury sufficient to afford opportunity to the employer to make an investigation into the facts, is equivalent to service under Section 5400.
(b) If liability is not rejected within 90 days after the date the claim form is filed under Section 5401, the injury shall be presumed compensable under this division. The presumption of this subdivision is rebuttable only by evidence discovered subsequent to the 90-day period.
(c) Within one working day after an employee files a claim form under Section 5401, the employer shall authorize the provision of all treatment, consistent with Section 5307.27, for the alleged injury and shall continue to provide the treatment until the date that liability for the claim is accepted or rejected. Until the date the claim is accepted or rejected, liability for medical treatment shall be limited to ten thousand dollars ($10,000).
d) Treatment provided under subdivision (c) shall not give rise to a presumption of liability on the part of the employer.