t is an industry standard concerned mostly with estimating and repairs to lessor owened or managed container
This may help....
from www.iicl.org:
The Institute of International Container Lessors (IICL), organized in 1971, is the trade association for the international container leasing industry. It is active in governmental, regulatory, safety, technical, electronic communication, and environmental fields throughout the world. The members of IICL are engaged in leasing marine cargo containers to ship operators and others on a broad international basis. These members represent 90% of the leasing industry and account for the ownership of approximately fifty percent of the world's leased containers.
REQUIREMENTS FOR CERTIFICATION The examination is open to anyone interested in becoming IICL-certified as a container inspector. IICL certification is awarded to all candidates who pass the examination and is valid for five years. An inspector must pass the examination again before certification is reissued. Certification does not authorize an individual to represent IICL in any manner. Certification may be revoked by IICL for any of the following reasons: willfully falsifying information on the registration form, making unauthorized material available to others, or misuse of certification.