contractually
Adverb
Meaning
by virtue of a contract
Source: WordNetExamples
they were contractually responsible
Angrily, Disney refused the deal and returned to produce the final Oswald cartoons he contractually owed Mintz.
But Payton is contractually obligated to the New Orleans Saints.
Even the producers are not ignorant to how much the contestant’s lives are about to change; those who go into the villa are now contractually obliged to undertake therapy to help them adapt to the post- spotlight.
By 1983 Bevan was expressing a desire to join Black Sabbath permanently and Lynne and Tandy were recording tracks for the Electric Dreams soundtrack under Lynne's name; however, Lynne was contractually obligated to make one more ELO album.
Although Gauntlett was contractually to stay as chairman for two years, his racing interests took Aston back into sports car racing in 1989 with limited European success.