Short-term Disability should be explained in your Health & Welfare Plan's Summary Plan Description (SPD) booklet that they sent you.
FMLA is described in the Contract:
ARTICLE 16. LEAVE OF ABSENCE
Section 6. Family and Medical Leave Act (FMLA)
All employees who have worked for the Company for a minimum of twelve (12) months and worked at least 1250 hours during the past twelve (12) months are eligible for unpaid leave as set forth in the Family and Medical Leave Act of 1993.
Additionally, any employee not covered above, that has worked for the Company for a minimum of thirty-six (36) months and accrued at least 625 paid hours during the past twelve (12) months is eligible for unpaid leave as set forth below, except that the amount of leave allowed will be computed at one half (1/2) of the time provided by the FMLA.
Eligible employees are entitled up to a total of 12/6 weeks of unpaid leave during any twelve (12) month period for the following reasons:
1. Birth of a child;
2. Adoption, or placement for foster care;
3. To care for a spouse, child, or parent of the employee due to a serious health condition;
4. A serious health condition of the employee.
The employee’s seniority rights shall continue as if the employee had not taken leave under this section, and the Employer will maintain health insurance coverage during the period of the leave.
The Employer may require the employee to substitute accrued paid vacation or other paid leave for part of the 12/6 week leave period. The employee is required to provide the Employer with at least thirty (30) days advance notice before FMLA leave begins if the need for leave is foreseeable. If the leave is not foreseeable, the employee is required to give notice as soon as practicable. The Employer has the right to require medical certification of a need for leave under this Act. In addition, the Employer has the right to require a second (2nd) opinion at the Employer’s expense.
The provisions of this section are in response to the Federal Act and shall not supersede any state or local law, which provides for greater employee rights.
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Go here and learn all you can about FMLA . . .
http://www.dol.gov/whd/fmla/