Section 20-B. Compensation and Benefits for Injury or Illness.      The liabilities of the employer when the seafarer suffers work-related injury or illness during the term of his contract are as follows:   x  x  x  x   However, if after repatriation, the seafarer still requires medical attention arising from said injury or illness, he shall be so provided at cost to the employer until such time he is declared fit or the degree of his disability has been established by the companydesignated physician.   3. Upon sign-off from the vessel for medical treatment, the seafarer is entitled to sickness allowance equivalent to his basic wage until he isdeclared fit to work or the degree of permanent disability has been assessed by the companydesignated physician but in no case shall this period exceed one hundred twenty (120) days.   For this purpose, the seafarer shall submit himself to a post-employment medical examination by a company-designated physician within three working days upon his return except when he is physically incapacitated to do so, in which case, a written notice to the agency within the same period is deemed as compliance. Failure of the seafarer to comply with the mandatory reporting requirement shall result in his forfeiture of the right to claim the above benefits.   If a doctor appointed by the seafarer disagrees with the assessment, a third doctor may be agreed jointly between the employer and the seafarer. The third doctor’s decision shall be final and binding on both parties.   x  x  x  x [Emphasis supplied.]   Thus, the seafarer, upon sign-off from his vessel, must report to the companydesignated physician within three (3) days from arrival for diagnosis and treatment. For the duration of the treatment but in no case to exceed 120 days, the seaman is on temporary total disability as he is totally unable to work. He receives his basic wage during this period until he is declared fit to work or his temporary disability is acknowledged by the company to be permanent, either partially or totally, as his condition is defined under the POEA-SEC and by applicable Philippine laws. If the 120-day initial period is exceeded and no such declaration is made because the seafarer requires further medical attention, then the temporary total disability period may be extended up to a maximum of 240 days,[23] subject to the right of the employer to declare within this period that a permanent partial or total