Where does AC_CHECK_DECL belong?

[NightStrike]

In the autoconf manual, there is a list of a recommended order of operations:

     Autoconf requirements
     AC_INIT(package, version, bug-report-address)
     information on the package
     checks for programs
     checks for libraries
     checks for header files
     checks for types
     checks for structures
     checks for compiler characteristics
     checks for library functions
     checks for system services
     AC_CONFIG_FILES([file...])
     AC_OUTPUT


Where do the symbol tests for AC_CHECK_DECL fit into that list?
Where's the best place to put those tests?