The phrase "agrees to observe" is correct and usable in written English.
It can be used in contexts where someone is committing to follow rules, guidelines, or standards.
Example: "The contractor agrees to observe all safety regulations while on the job site."
Alternatives: "commits to follow" or "pledges to adhere".
What's more, they got Google, Microsoft, Yahoo and AOL to agree to observe them.
On that occasion, the British media had been aware of the deployment but agreed to observe a strict media blackout.
But China has refused to join the MRC or to agree to observe its resource management guidelines, preferring to remain a "dialogue partner".
It may still be useful for groups of governments (like the Council of Europe) to band together to agree to observe certain standards.
The Palestinians have suspended their intifada: most of the armed factions have agreed to observe a truce, though they call it merely a tahdia, or "lull".
Mayor Dickinson said that he admired Dr. King and his achievements, but that he would not agree to observe the holiday unless the labor unions that represent town workers first agreed to give up one of their other paid holidays.
In Thursday morning's session the two teams agreed to observe a minute's silence to remember the victims of "terrorism" – but quickly blamed each other for perpetrating the violence.
The mortar fire interrupted a ceasefire called for by the UN on humanitarian grounds, which both Israel and Hamas had agreed to observe between 0700 GMT and 1200 GMT.
Later that month the Chinese signed the Beijing Convention, in which they agreed to observe the treaties of Tianjin and also ceded to the British the southern portion of the Kowloon Peninsula adjacent to Hong Kong.
Later that year the Chinese signed the Beijing Convention, in which they agreed to observe the treaties of Tianjin and also ceded to the British the southern portion of the Kowloon Peninsula adjacent to Hong Kong.
