I don't like to play the pessimist's role on this - but there is just one problem in the whole thing that makes me reluctant to sign it - the use of the word "compulsory". And there is another problem here in that the government is expected to force classical music into people's ears. Let me share one particular observation -- no one, especially grown ups, like to have anything (even if good) forced on them. "Compulsory" does not work in today's world. Our music is not the only one in India either. When you try to make one compulsory, you have to make them all compulsory.
I forsee another set of newspaper articles coming soon about "authoritarian issues with the Modi govt" and "saffron music". I will not be surprised to hear a refrain "kurta dhoti suit sangeet ka sarkar" coming from a certain someone.

Votes are after all, the most important thing, even above the motherland, aren't they?
Awareness and good PR have a much more effective impact. While we have a tendency to look down on the PR and publicity aspects of our music ("projection" is a word that attracts negative comment from quite a few), I have seen quite a few good ideas and initiatives suffer (even on this forum) because our "public relations" skills have only served to drive away our intended audience.

We have a lot to learn in that aspect.
I think the initiative of having a "World music day" like "World yoga day" would be helpful. Our PM could probably spare a note in "Mann Ki Bharat" about his experience in listening to great pieces of classical music. Let the people decide what they want to do with that.
https://en.wikipedia.org/wiki/F%C3%AAte_de_la_Musique
Schools can be encouraged (but not compelled) to provide an option for students to take up music -- for which one needs to arrange for good teachers and instruments, necessary classrooms / outdoors, etc. We could do better to promote radio classical music too (radioweb is a great example, AIR unfortunately isn't doing as much today as they once used to). Today there are lots of groups on FB that share many rare collections and compositions (very neatly sorted into lists on Youtube) that give access to musical repertoire in a manner unheard of even 10 years ago. Today I can find 200 Dikshitar compositions in one list on Youtube (which I can download with a simple add on if I want to) and virtually every composition of Thyagaraja. Soon others will follow.
My own school used to play CM instrumental for the bell. In the course of a few days, I would listen to an entire cassette in bits and pieces. There was once a wonderful Shanmukhapriya alapana that played for 3 days like this, with Taanam too. But not many realized what they were listening to.
Many more adults will join if you let them come in of their own accord with some encouragement - the music is beautiful and that will do the job. "Compulsory" will just make a political issue out of it and it will rake up the issues normally swept under the carpet, the issues that spoil our enjoyment of the music, rather than the greatness of the music itself. Adults are more complicated.

Always give them the choice. One can never force anyone else to love music, or anything else. It is not love till it comes from one's own choice.
Then there are children. If we really want our kids to have the kind of exposure to CM (or HM or any classical music), we need to take sufficient proactive action at home first. My family did a great job there for me despite many limitations. In other families where I do not see the children liking classical music, the simple answer (which I can confirm from observation) is that no one in their family was enthusiastic or proactive in that direction to begin with and the children never got that exposure while growing up -- the sad reality is that people who are more starved of the music of their roots sometimes recognize it's value much more than people for whom that access is more readily available. I do concede that in the case of kids it is true that it is the music that chooses it's heirs. But there are things we can do in our homes which we cannot ask schools or colleges (ESPECIALLY NOT COLLEGES!

) or governments to introduce or force.
Let's sign a document promising that we'll ask our kids to listen to CM every day and let them learn something daily in a well planned manner and we promise to share one recording on our FB walls daily or at least weekly? (non-commercial, preferably vintage, or with the consent of the artistes') or on twitter?