Section 314. Claim filing

The right to compensation including medical care
  and funeral expenses under the  provisions  of  this  article  shall  be
  barred  unless  written  claim  is filed with the chairman within ninety
  days after injury or, if death results  therefrom,  within  ninety  days
  after  death;  except that if death shall occur more than one year after
  the injury, the right shall be barred unless prior written  claim  based
  on the injury has been timely filed. If disability or death is caused by
  a  disease  that  is  included  among the diseases enumerated in section
  forty, then the claim may be filed within the time  and  in  the  manner
  provided in section forty.
    Failure  to  file  written  claim  as  required  may be excused by the
  chairman on the ground that, for good and sufficient reason, claim could
  not be filed on time.