Under the new bus contracting model, as all the bus routes are under the Bulim Bus Package, 61 and 991 come under the Choa Chu Kang-Bukit Panjang Bus Package. 852 comes under the Seletar Bus Package (SBS Transit).
Under the new bus contracting model, all bus routes are grouped under a single package, namely the Bulim Bus Package. This grouping also includes routes 61 and 991 within the Choa Chu Kang-Bukit Panjang Bus Package, while route 852 is managed by SBS Transit as part of the Seletar Bus Package.