ITM received. District 571 Help plse.

[Tiffaney]

Received ITM notice in Christchurch District.
date of notice: May 30 1868.
Names & Surnames  William McLauchlan     Christina Sutherland
of Parties:
Condition:                 Bachelor                     Spinster
Calling or
Profession:                Farmer                       Domestic
Age:                           28                              25
Length of
residence:                   7 years                     3 mths

Dwelling place            Springs Track              Christchurch

Church, Building, Office or Place where marriage was to be solemnized:       In the house of Mr Sutherland Christchurch.

District in which the other party resides, when parties reside in different Districts:     571.
Can someone plse help me with the 571.

Also thought I might have found an initial with Mr Sutherland when ordering ITM. Would I  have more luck with their Marriage cert.
thanks Tiff.
ps
Thought Christina had come out from Caithness in June 1867  aged 28 but couldn't have been that Christina, going by length of time & age (3mths) with Sutherlands unless she stayed somewhere else first.