An employer has a sick leave policy that employees who are absent for fewer than three days are not required to provide a medical certificate. The policy also requires the employer to pay employees who are absent due to illness for fewer than three days regardless of whether a medical certificate has been provided. Does this policy prevent the employer, in terms of its disciplinary policy and procedure, from issuing warnings for misconduct to employees who are absent for fewer than three days? And, should such conduct persist, can the employer take stronger measures against the employees despite its sick leave policy?