Sub-sub-series consists of microfilmed copies of the individual manifests known as Form 30A. Beginning 1 June 1921, the Department of Immigration and Colonization required that individual manifests (Form 30A) be completed and submitted to the immigration officers at the ports of arrival, rather than using the older, large manifest sheets. A form had to be submitted for each passenger, including children, except those in transit to the United States. Form 30A included the following details: name of ship, date of sailing, port and date of arrival, name, age, occupation, birthplace, race, citizenship, religion, previous residence in Canada, destination, and nearest relative in the country from which the immigrant came. Some sheet manifests, however, were still in use as late as 1922. The use of Form 30A was discontinued as of 1 January 1925. From that date, the use of large sheet manifests was reinstated.
An earlier version of this form was used by some immigration offices as early as 1919. For those arrivals, no sheet manifests were submitted, only the individual Form 30As. On these earlier forms, the names of accompanying dependents were usually included with the head-of-household, not on separate forms.
The forms were microfilmed in quasi-alphabetical order. For each letter of the alphabet, surnames are arranged in groupings based on the initial letter of each name. For example, surnames beginning with Ada, Adc and Add are interfiled starting with given names beginning with A. Such a grouping could include the following arrangement of forms: Anne Adair, Benjamin Adcock, Christopher Addison, David Adair, etc. Another example would be: Adam Downey, Bertha Dow, Claire Dowd, Edward Downes, etc. Some of the more common surnames, such as Smith, Adams, MacLeod, etc. are grouped separately. Note that each form was microfilmed with the back side first, followed by the front page of the form.