Update! Since this question was asked, the --type-check flag has been deprecated so you should be able use:
tslint --project tsconfig.json src/**/**.ts
Original answer below.
I believe that this means you can’t enable the no-use-before-declare rule unless you run with the --type-check and the --project flags. It must depend on something that happens when those flags are passed in order to determine rule violations.
tslint --type-check --project tslint.json src/**/**.ts