### Question
What is the definition of Great Lakes shipping season?


### Answer
The definition of **Great Lakes shipping season** is as follows in *46 U.S.C. § 55331*:

> the period each year during which the Saint Lawrence Seaway is open for navigation by vessels, as declared by the Saint Lawrence Seaway Development Corporation

#### Citation:
  - *46 U.S.C. § 55331*
  - Heading: **Subtitle V-Merchant Marine > Part D-Promotional Programs > CHAPTER 553-PASSENGER AND CARGO PREFERENCES > SUBCHAPTER III-AMERICAN GREAT LAKES VESSELS**

