code: func (l *Lint) CheckEffective(c *x509.Certificate) bool {
  	if l.EffectiveDate.IsZero() || !l.EffectiveDate.After(c.NotBefore) {
  		return true
  	}
  	return false
  }
docs: // CheckEffective returns true if c was issued on or after the EffectiveDate. If
  // EffectiveDate is zero, CheckEffective always returns true.