某信用证上规定以下条款：
Applicant: Nissho Iwai Corporation No. 4-5 Akaasaka 2-Chome Mi-Natou Tokyo, Japan Bneficiary: China National Mine Import and Export Corp. Beijing, P. R. China Preadvice: Bank of China, Beijing Branch Full sets of clean on board marine bill of lading made out to order of shipper and blank endorsed and marked freight prepaid and notify applicant.

土地征收应履行哪些程序？